Rework docker bits

README.md

@@ -45,4 +45,3 @@ To run commands in the context of the container, e.g., `rails console`:
 ```
 docker-compose run --rm app rails console
 ```
-

config/database.yml

@@ -4,13 +4,7 @@
 #   Ensure the SQLite 3 gem is defined in your Gemfile
 #   gem 'sqlite3'
 development: &default
-  adapter: postgresql
-  database: <%= ENV['DB_NAME'] || 'crb_dev_duex' %>
-  username: <%= ENV['DB_USERNAME'] || 'postgres' %>
-  password: <%= ENV['DB_PASSWORD'] %>
-  host: <%= ENV['DB_HOST'] || 'localhost' %>
-  encoding: unicode
-  pool: 5
+  url: <%= ENV['DATABASE_URL'] %>
 
 # Warning: The database defined as "test" will be erased and
 # re-generated from your development database when you run "rake".

docker-compose.yml

@@ -11,14 +11,10 @@ services:
     links:
       - postgres
     environment:
-      DB_NAME: crb_dev_duex
-      DB_USERNAME: postgres
-      DB_PASSWORD: password
-      DB_HOST: postgres
+      DATABASE_URL: postgresql://postgres:password@postgres/crb_development?pool=5
 
   postgres:
     image: postgres:9.6
-    container_name: columbusrb.com-postgres
     environment:
       POSTGRES_USER: postgres
       POSTGRES_PASSWORD: password