Create a container to run a DJ worker in dev

docker-compose.yml

@@ -31,7 +31,22 @@ services:
       bash -c "wait-for-it -t 30 db:5432 &&
                rm -f tmp/pids/server.pid &&
                bundle exec rails s -p 3000 -b '0.0.0.0'"
-
+  worker:
+    tty: true
+    stdin_open: true
+    build: .
+    volumes:
+      - .:/usr/src/app
+      - gems:/bundles
+      - ./config/database.yml:/usr/src/app/config/database.yml
+      - ./config/application.yml.example:/usr/src/app/config/application.yml
+    depends_on:
+      - db
+    environment:
+      OFN_DB_HOST: db
+    command: >
+      bash -c "wait-for-it -t 30 db:5432 &&
+               bundle exec rake jobs:work"
 volumes:
   gems:
   postgres: