Ability to run tests in docker

docker-compose -f test/docker-compose.yml run --rm web

config/test.exs

@@ -12,6 +12,7 @@ config :logger, level: :warn
 # Configure your database
 config :asciinema, Asciinema.Repo,
   adapter: Ecto.Adapters.Postgres,
+  url: System.get_env("DATABASE_URL"),
   username: "postgres",
   password: "postgres",
   database: "asciinema_test",

test/.env

@@ -0,0 +1,4 @@
+RAILS_ENV=test
+MIX_ENV=test
+BASE_URL=http://localhost:3000
+BUNDLE_PATH=/bundle

test/docker-compose.yml

@@ -0,0 +1,29 @@
+version: '3'
+
+volumes:
+  deps:
+  bundle:
+  node_modules:
+  build:
+
+services:
+  postgres:
+    image: postgres
+
+  redis:
+    image: redis
+
+  web:
+    build: .
+    image: asciinema/asciinema.org
+    command: mix test
+    links:
+      - redis
+      - postgres
+    env_file: .env
+    volumes:
+      - deps:/app/deps:cached
+      - bundle:/bundle:cached
+      - node_modules:/app/node_modules:cached
+      - build:/app/_build:cached
+      - ../:/app:cached