Dockerize! Startup with docker-compose up

Make sure to docker-compose build first

config/database.yml.example

@@ -1,23 +1,19 @@
-development:
+development: &default
   adapter: postgresql
-  database: velocipede
-  username: velocipede
-  password:
-  host: 127.0.0.1
+  encoding: unicode
+  pool: 5
+  database: <%= ENV['RDS_DB_NAME'] || 'postgres' %>
+  username: <%= ENV['RDS_USERNAME'] || 'postgres' %>
+  password: <%= ENV['RDS_PASSWORD'] %>
+  host: <%= ENV['RDS_HOSTNAME'] || 'db' %>
 
 # Warning: The database defined as "test" will be erased and
 # re-generated from your development database when you run "rake".
 # Do not set this db to the same as development or production.
 test:
-  adapter: postgresql
+  <<: *default
   database: velocipede_test
-  username: velocipede
-  password:
-  host: 127.0.0.1
 
 production:
-  adapter: postgresql
-  database: velocipede
-  username: velocipede
-  password:
-  host: 127.0.0.1
+  <<: *default
+  database: velocipede_production