Add docker container definition

Change-Id: If32020e6b8e8bb816eb54533554b18cc5302b5c9
diff --git a/.env.sample b/.env.sample
new file mode 100644
index 0000000..0e442e9
--- /dev/null
+++ b/.env.sample
@@ -0,0 +1,7 @@
+DB_SERVERNAME=db
+DB_USERNAME=root
+DB_PASSWORD=
+DB_NAME=pastanaga
+DB_USERS_DB=pastanaga
+DB_MORTS_DB=pastanaga_morts
+ADMIN_TOKEN=longRandomStringForTheAdminPages