diff --git a/settings.py b/settings.py
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+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file or at
+# https://developers.google.com/open-source/licenses/bsd
+
+"""Defines settings for monorail."""
+from __future__ import print_function
+from __future__ import division
+from __future__ import absolute_import
+
+import os
+import re
+
+from google.appengine.api import app_identity
+
+from framework import framework_constants
+from proto import project_pb2
+from proto import site_pb2
+
+
+# This file is divided into the following parts:
+# 1. Settings you must edit before deploying your site.
+# 2. Settings you would edit on certain occasions while maintaining your site.
+# 3. Settings enable specific features.
+# 4. Settings that you can usually leave as-is.
+
+# TODO(jrobbins): Store these settings in the database and implement
+# servlets for domain admins to edit them without needing to redeploy the
+# app.
+
+
+####
+# Part 1: settings that you must edit before deploying your site.
+
+# Email address that is offered to users who might need help using the tool.
+feedback_email = 'jrobbins+monorail.feedback@chromium.org'
+
+# For debugging when running in staging: send all outbound
+# email to this address rather than to the actual address that
+# it would normally be sent to.
+send_all_email_to = 'monorail-staging-emails+all+%(user)s+%(domain)s@google.com'
+
+# For debugging when running the server locally: send all outbound
+# email to this address rather than to the actual address that
+# it would normally be sent to.
+send_local_email_to = (
+    send_all_email_to or
+    'monorail-staging-emails+dev+%(user)s+%(domain)s@google.com')
+
+# User to send emails from Monorail as. The reply_to sections of emails will be
+# set to appspotmail addresses.
+# Note: If configuring a new monorail instance without DNS records and reserved
+#       email addresses then setting these values to
+#       'reply@${app_id}.appspotmail.com' and 'noreply@{app_id}.appspotmail.com'
+#       is likely the best option.
+send_email_as_format = 'monorail@%(domain)s'
+send_noreply_email_as_format = 'monorail+noreply@%(domain)s'
+
+# The default is to look for a database named "monorail" in replicas
+# named "replica-00" .. "replica-09"
+# Replica names for -prod, -staging, and -dev may diverge if replicas ever fail.
+# In such cases the db_replica_names list can be overwritten in Part 5.
+db_database_name = 'monorail'
+db_primary_name = 'primary'
+db_replica_prefix = 'replica'
+db_region = 'us-central1'
+
+# The default connection pool size for mysql connections.
+db_cnxn_pool_size = 20
+
+# The number of logical database shards used.  Each replica is complete copy
+# of the primary, so any replica DB can answer queries about any logical shard.
+num_logical_shards = 10
+
+# "Learn more" link for the site home page
+learn_more_link = None
+
+# Site name, displayed above the search box on the site home page.
+site_name = 'Monorail'
+
+# Who is allowed to create new projects?  Set to ANYONE or ADMIN_ONLY.
+project_creation_restriction = site_pb2.UserTypeRestriction.ADMIN_ONLY
+
+# Default access level when creating a new project.
+default_access_level = project_pb2.ProjectAccess.ANYONE
+
+# Possible access levels to offer when creating a new project.
+allowed_access_levels = [
+    project_pb2.ProjectAccess.ANYONE,
+    project_pb2.ProjectAccess.MEMBERS_ONLY]
+
+# Who is allowed to create user groups?  Set to ANYONE or ADMIN_ONLY.
+group_creation_restriction = site_pb2.UserTypeRestriction.ADMIN_ONLY
+
+# Who is allowed to create hotlists? Set to ANYONE or ADMIN_ONLY.
+hotlist_creation_restriction = site_pb2.UserTypeRestriction.ANYONE
+
+# Text that mentions these words as shorthand host names will be autolinked
+# regardless of the lack of "https://" or ".com".
+autolink_shorthand_hosts = [
+    'go', 'g', 'shortn', 'who', 'teams',
+    ]
+autolink_numeric_shorthand_hosts = [
+    'b', 't', 'o', 'omg', 'cl', 'cr',
+    ]
+
+
+# We only allow self-service account linking invites when the child account is
+# linking to a parent account in an allowed domain.
+linkable_domains = {
+  # Child account domain: [parent account domains]
+  'chromium.org': ['google.com'],
+  'google.com': ['chromium.org'],
+  # TODO(jrobbins): webrtc.org, etc.
+}
+
+
+####
+# Part 2: Settings you would edit on certain occasions.
+
+# Read-only mode prevents changes while we make server-side changes.
+read_only = False
+
+# Timestamp used to notify users when the read only mode or other status
+# described in the banner message takes effect.  It is
+# expressed as a tuple of ints: (year, month, day[, hour[, minute[, second]]])
+# e.g. (2009, 3, 20, 21, 45) represents March 20 2009 9:45PM UTC.
+banner_time = None
+
+# Display a site maintenance banner on every monorail page.
+banner_message = ''
+
+# User accounts with email addresses at these domains are all banned.
+banned_user_domains = []
+
+# We use this for specifying cloud task parent
+CLOUD_TASKS_REGION = 'us-central1'
+
+# We only send subscription notifications to users who have visited the
+# site in the last 6 months.
+subscription_timeout_secs = 180 * framework_constants.SECS_PER_DAY
+
+# Location of GCS spam classification staging trainer. Whenever the training
+# code is changed, this should be updated to point to the new package.
+trainer_staging = ('gs://monorail-staging-mlengine/spam_trainer_1517870972/'
+                   'packages/befc9b29d9beb7e89d509bd1e9866183c138e3a32317cc'
+                   'e253342ac9f8e7c375/trainer-0.1.tar.gz')
+
+# Location of GCS spam classification prod trainer. Whenever the training
+# code is changed, this should be updated to point to the new package.
+trainer_prod = ('gs://monorail-prod-mlengine/spam_trainer_1521755738/packages/'
+                '3339dfcb5d7b6c9d714fb9b332fd72d05823e9a1850ceaf16533a6124bcad'
+                '6fd/trainer-0.1.tar.gz')
+####
+# Part 3: Settings that enable specific features
+
+# Enables "My projects" drop down menu
+enable_my_projects_menu = True
+
+# Enables stars in the UI for projects
+enable_project_stars = True
+
+# Enables stars in the UI for users
+enable_user_stars = True
+
+# Enable quick edit mode in issue peek dialog and show dialog on hover
+enable_quick_edit = True
+
+
+####
+# Part 4: Settings that you can usually leave as-is.
+
+# local_mode makes the server slower and more dynamic for easier debugging.
+# E.g., template files are reloaded on each request.
+local_mode = os.environ['SERVER_SOFTWARE'].startswith('Development')
+unit_test_mode = os.environ['SERVER_SOFTWARE'].startswith('test')
+
+# If we assume 1KB each, then this would be 400 MB for this cache in frontends
+# that have only 1024 MB total.
+issue_cache_max_size = 400 * 1000
+
+# If we assume 1KB each, then this would be 400 MB for this cache in frontends
+# that have only 1024 MB total.
+comment_cache_max_size = 400 * 1000
+
+# 150K users should be enough for all the frequent daily users plus the
+# occasional users that are mentioned on any popular pages.
+user_cache_max_size = 150 * 1000
+
+# Normally we use the default namespace, but during development it is
+# sometimes useful to run a tainted version on staging that has a separate
+# memcache namespace.  E.g., os.environ.get('CURRENT_VERSION_ID')
+memcache_namespace = None  # Should be None when committed.
+redis_namespace = None
+
+# Default Redis host and port
+redis_host = 'localhost'
+redis_port = '6379'
+
+# Recompute derived issue fields via work items rather than while
+# the user is waiting for a page to load.
+recompute_derived_fields_in_worker = True
+
+# The issue search SQL queries have a LIMIT clause with this amount.
+search_limit_per_shard = 10 * 1000  # This is more than all open in chromium.
+
+# The GAE search feature is slow, so don't request too many results.
+# This limit is approximately the most results that we can get from
+# the fulltext engine in 1s.  If we reach this limit in any shard,
+# the user will see a message explaining that results were capped.
+fulltext_limit_per_shard = 1 * 2000
+
+# Retrieve at most this many issues from the DB when showing an issue grid.
+max_issues_in_grid = 6000
+# This is the most tiles that we show in grid view.  If the number of results
+# is larger than this, we display IDs instead.
+max_tiles_in_grid = 1000
+
+# Maximum number of project results to display on a single pagination page
+max_project_search_results_per_page = 100
+
+# Maximum number of results per pagination page, regardless of what
+# the user specified in their request.  This exists to prevent someone
+# from doing a DoS attack that makes our servers do a huge amount of work.
+max_artifact_search_results_per_page = 1000
+
+# Maximum number of comments to display on a single pagination page
+max_comments_per_page = 500
+
+# Max number of issue starrers to notify via email.  Issues with more
+# that this many starrers will only notify the last N of them after a
+# comment from a project member.
+max_starrers_to_notify = 4000
+
+# In projects that have more than this many issues the next and prev
+# links on the issue detail page will not be shown when the user comes
+# directly to an issue without specifying any query terms.
+threshold_to_suppress_prev_next = 10000
+
+# Format string for the name of the FTS index shards for issues.
+search_index_name_format = 'issues%02d'
+
+# Name of the FTS index for projects (not sharded).
+project_search_index_name = 'projects'
+
+# Each backend has this many seconds to respond, otherwise frontend gives up
+# on that shard.
+backend_deadline = 45
+
+# If the initial call to a backend fails, try again this many times.
+# Initial backend calls are failfast, meaning that they fail immediately rather
+# than queue behind other requests.  The last 2 retries will wait in queue.
+backend_retries = 3
+
+# Do various extra logging at INFO level.
+enable_profiler_logging = True
+
+# Mail sending domain.  Normally set this to None and it will be computed
+# automatically from your AppEngine APP_ID. But, it can be overridden below.
+mail_domain = None
+
+# URL format to browse source code revisions.  This can be overridden
+# in specific projects by setting project.revision_url_format.
+# The format string may include "{revnum}" for the revision number.
+revision_url_format = 'https://crrev.com/{revnum}'
+
+# Users with emails in the "priviledged" domains do NOT get any advantage
+# but they do default their preference to show unobscured email addresses.
+priviledged_user_domains = [
+  'google.com', 'chromium.org', 'webrtc.org',
+  ]
+
+# Branded domains:  Any UI GET to a project listed below on prod or staging
+# should have the specified host, otherwise it will be redirected such that
+# the specified host is used.
+branded_domains = {}  # defaults to empty for localhost
+branded_domains_dev = {
+    'fuchsia': 'bugs-dev.fuchsia.dev',
+    '*': 'bugs-dev.chromium.org',
+}
+branded_domains_staging = {
+    'fuchsia': 'bugs-staging.fuchsia.dev',
+    '*': 'bugs-staging.chromium.org',
+}
+branded_domains_prod = {
+    'fuchsia': 'bugs.fuchsia.dev',
+    '*': 'bugs.chromium.org',
+}
+
+# The site home page will immediately redirect to a default project for these
+# domains, if the project can be viewed.  Structure is {hostport: project_name}.
+domain_to_default_project = {}  # defaults to empty for localhost
+domain_to_default_project_dev = {'bugs-dev.fuchsia.dev': 'fuchsia'}
+domain_to_default_project_staging = {'bugs-staging.fuchsia.dev': 'fuchsia'}
+domain_to_default_project_prod = {'bugs.fuchsia.dev': 'fuchsia'}
+
+
+# Names of projects on code.google.com which we allow cross-linking to.
+recognized_codesite_projects = [
+  'chromium-os',
+  'chrome-os-partner',
+]
+
+####
+# Part 5:  Instance-specific settings that override lines above.
+# This ID is for -staging and other misc deployments. Prod is defined below.
+analytics_id = 'UA-55762617-20'
+
+if unit_test_mode:
+  db_cloud_project = ''  # No real database is used during unit testing.
+  app_id = ''
+else:
+  app_id = app_identity.get_application_id()
+
+  if app_id == 'monorail-staging':
+    site_name = 'Monorail Staging'
+    banner_message = 'This staging site does not send emails.'
+    # The Google Cloud SQL databases to use.
+    db_cloud_project = app_id
+    branded_domains = branded_domains_staging
+    domain_to_default_project = domain_to_default_project_staging
+    # For each of these redis_hosts, they must match the corresponding
+    # HOST address of the redis instance for the environment. You can use
+    # the following command to find it.
+    # ```
+    # gcloud redis instances list --project monorail-staging \
+    #   --region us-central1
+    # ````
+    redis_host = '10.228.109.51'
+
+  elif app_id == 'monorail-dev':
+    site_name = 'Monorail Dev'
+    banner_message = 'This dev site does not send emails.'
+    # The Google Cloud SQL databases to use.
+    db_cloud_project = app_id
+    branded_domains = branded_domains_dev
+    domain_to_default_project = domain_to_default_project_dev
+    # See comment above on how to find this address.
+    redis_host = '10.150.170.251'
+    # Use replicas created when testing the restore procedures on 2021-02-24
+    db_replica_prefix = 'replica-2'
+
+  elif app_id == 'monorail-prod':
+    send_all_email_to = None  # Deliver it to the intended users.
+    # The Google Cloud SQL databases to use.
+    db_cloud_project = app_id
+    analytics_id = 'UA-55762617-14'
+    branded_domains = branded_domains_prod
+    domain_to_default_project = domain_to_default_project_prod
+    # See comment above on how to find this address.
+    redis_host = '10.190.48.180'
+
+if local_mode:
+  site_name = 'Monorail Local'
+  num_logical_shards = 10
+  redis_host = 'localhost'
+  # Run cloud tasks emulator at port 9090
+  CLOUD_TASKS_EMULATOR_ADDRESS = '127.0.0.1:9090'
+
+# Combine the customized info above to make the name of the primary DB instance.
+db_instance = db_cloud_project + ':' + db_region + ':' + db_primary_name
+
+# Combine the customized info above to make the names of the replica DB
+# instances.
+db_replica_names = ['{}-{:02d}'.format(db_replica_prefix, i) for i in range(10)]
+
+# Format string for the name of the physical database replicas.
+physical_db_name_format = (db_cloud_project + ':' + db_region + ':%s')
+
+# preferred domains to display
+preferred_domains = {
+    'monorail-prod.appspot.com': 'bugs.chromium.org',
+    'monorail-staging.appspot.com': 'bugs-staging.chromium.org',
+    'monorail-dev.appspot.com': 'bugs-dev.chromium.org'}
+
+# Borg robot service account
+borg_service_account = 'chrome-infra-prod-borg@system.gserviceaccount.com'
+
+# Prediction API params.
+classifier_project_id = 'project-id-testing-only'
+
+# Necessary for tests.
+if 'APPLICATION_ID' not in os.environ:
+  os.environ['APPLICATION_ID'] = 'testing-app'
+
+if local_mode:
+  # There is no local stub for ML Engine.
+  classifier_project_id = 'monorail-staging'
+else:
+  classifier_project_id = app_identity.get_application_id()
+
+classifier_model_id = '20170302'
+
+# Number of distinct users who have to flag an issue before it
+# is automatically removed as spam.
+# Currently effectively disabled.
+spam_flag_thresh = 1000
+
+# If the classifier's confidence is less than this value, the
+# item will show up in the spam moderation queue for manual
+# review.
+classifier_moderation_thresh = 1.0
+
+# If the classifier's confidence is greater than this value,
+# and the label is 'spam', the item will automatically be created
+# with is_spam=True, and will be filtered out from search results.
+classifier_spam_thresh = 0.995
+
+# Users with email addresses ending with these will not be subject to
+# spam filtering.
+spam_allowlisted_suffixes = (
+    '@chromium.org',
+    '.gserviceaccount.com',
+    '@google.com',
+    '@webrtc.org',
+)
+
+# New issues filed by these users in these groups
+# automatically get the Restrict-View-Google label.
+restrict_new_issues_user_groups = [
+    'chromeos-all@google.com',
+    'chromeos-acl@google.com',
+    'chromeos-fte-tvc@google.com',
+    'chromeos-fte-tvc@chromium.org',
+    'create-team@google.com',
+    'test-corp-mode@google.com',
+]
+
+# Users in these groups see a "corp mode" warning dialog when commenting
+# on public issues, informing them that their comments are public by default.
+public_issue_notice_user_groups = [
+    'chromeos-all@google.com',
+    'chromeos-acl@google.com',
+    'chromeos-fte-tvc@google.com',
+    'chromeos-fte-tvc@chromium.org',
+    'create-team@google.com',
+    'test-corp-mode@google.com',
+    'tq-team@google.com',
+]
+
+full_emails_perm_groups = [
+    # Synced group that gives members permission to view the full
+    # emails of all users.
+    'monorail-display-names-perm@google.com',
+    # Native Monorail group that gives service account members permission
+    # to view full emails of all users.
+    'display-names-perm-sa@bugs.chromium.org'
+]
+
+# These email suffixes are allowed to create new alert bugs via email.
+alert_allowlisted_suffixes = ('@google.com',)
+
+# The person who is notified if there is an unexpected problem in the alert
+# pipeline.
+alert_escalation_email = 'zhangtiff@google.com'
+
+# Bugs autogenerated from alert emails are created through this account.
+alert_service_account = 'chrome-trooper-alerts@google.com'
+
+# The number of hash buckets to use when vectorizing text from Issues and
+# Comments. This should be the same value that the model was trained with.
+spam_feature_hashes = 500
+
+# The number of features to use when vectorizing text from Issues and
+# Comments. This should be the same value that the model was trained with.
+component_features = 5000
+
+# The name of the spam model in ML Engine.
+spam_model_name = 'spam_only_words'
+
+# The name of the component model in ML Engine
+component_model_name = 'component_top_words'
+
+# The name of the gcs bucket containing component predicition trainer code.
+component_ml_bucket = classifier_project_id + '-mlengine'
+
+ratelimiting_enabled = True
+
+# Requests that hit ratelimiting_cost_thresh_sec get one extra count
+# added to their bucket at the end of the request for each additional
+# multiple of this latency.
+ratelimiting_ms_per_count = 1000
+
+api_ratelimiting_enabled = True
+
+# When we post an auto-ping comment, it is posted by this user @ the preferred
+# domain name.  E.g., 'monorail@bugs.chromium.org'.
+date_action_ping_author = 'monorail'
+
+# Hard-coding this so that we don't rely on sys.maxint, which could
+# potentially differ. It is equal to the maximum unsigned 32 bit integer,
+# because the `int(10) unsigned` column type in MySQL is 32 bits.
+maximum_snapshot_period_end = 4294967295
+
+# The maximum number of rows chart queries can scan.
+chart_query_max_rows = 10000
+
+# Client ID to use for loading the Google API client, gapi.js.
+if app_identity.get_application_id() == 'monorail-prod':
+  gapi_client_id = (
+    '679746765624-tqaakho939p2mc7eb65t4ecrj3gj08rt.apps.googleusercontent.com')
+else:
+  gapi_client_id = (
+    '52759169022-6918fl1hd1qoul985cs1ohgedeb8c9a0.apps.googleusercontent.com')
+
+# The pub/sub topic on which to publish issue update messages.
+if local_mode:
+  # In local dev, send issue updates to the monorail-dev project.
+  # There also exists a pubsub emulator we could potentially use in the future:
+  # https://cloud.google.com/pubsub/docs/emulator
+  pubsub_project = 'monorail-dev'
+else:
+  pubsub_project = app_identity.get_application_id()
+
+pubsub_topic_id = 'projects/%s/topics/issue-updates' % pubsub_project
+
+# All users in the following domains will have API access.
+# Important: the @ symbol must be included.
+api_allowed_email_domains = ('@google.com')