Add Docker setup for production environment.

docker-compose-prod.yml

@@ -0,0 +1,42 @@
+version: '3.7'
+services:
+  nginx:
+    build:
+      context: ./docker/nginx
+      dockerfile: Dockerfile
+    depends_on:
+      - app
+      - swagger
+    ports:
+      - ${DOCKER_CAPTCHA_NGINX_PORT}:80
+  app:
+    depends_on:
+      - redis
+    build:
+      context: ./docker/app
+      dockerfile: Dockerfile
+      target: PRODUCTION
+#    restart: always
+    cap_drop:
+      - ALL
+    cap_add:
+      - SETGID
+      - SETUID
+      - CHOWN
+      - FOWNER
+    ports:
+      - "9000"
+    env_file: .env
+    volumes:
+      - /etc/localtime:/etc/localtime:ro
+  swagger:
+    image: swaggerapi/swagger-ui
+    depends_on:
+      - app
+    environment:
+      URLS: "[ { url: '/swagger.json', name: '/swagger.json' } ]"
+      BASE_URL: /api-docs
+    ports:
+      - "8080"
+  redis:
+    image: redis:3.0-alpine