add docker

docker-compose.yml

@@ -0,0 +1,31 @@
+version: '3'
+
+volumes:
+  bundle:
+  db:
+
+services:
+  db:
+    image: nouchka/sqlite3:latest
+    volumes:
+      - db:/root/db
+    stdin_open: true
+    tty: true
+
+  web: &rails
+    build:
+      context: .
+      dockerfile: Dockerfile
+    command: bash -c "rm -f tmp/pids/server.pid && bundle exec rake db:create db:migrate db:seed && bundle exec rails s -b '0.0.0.0'"
+    volumes:
+      - .:/app
+      - bundle:/usr/local/bundle
+      - ./node_modules:/app/node_modules
+    tmpfs: /app/tmp
+    depends_on:
+      - db
+    env_file: app.env
+    tty: true
+    stdin_open: true
+    ports:
+      - "3000:3000"