Add first version of the frontend

As of now the only usable functionality is signin in/out and managing
authorized users, and even then there is much room for improvement.

Change-Id: Ib87fc6866f69113a230187710de8644b78391917
diff --git a/frontend/src/config.json5 b/frontend/src/config.json5
new file mode 100644
index 0000000..07bff27
--- /dev/null
+++ b/frontend/src/config.json5
@@ -0,0 +1,8 @@
+{
+  // Details for the Sign In with Google functionality
+  google: {
+    clientId: '223047594100-ha7istt4csc0mlq11heogk7bqvmpbqo0.apps.googleusercontent.com',
+  },
+  // URL of the GRPC host
+  grpcWebHost: 'http://localhost:8081'
+}