feat: add Dockerfile for backend and frontend services with necessary configurations

docker-compose.yml

@@ -0,0 +1,45 @@
+version: "3.9"
+
+services:
+  db:
+    build:
+      context: ./infra/postgres
+    image: rail-game-postgres
+    environment:
+      POSTGRES_USER: railgame
+      POSTGRES_PASSWORD: railgame
+      POSTGRES_DB: railgame_dev
+    ports:
+      - "5432:5432"
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+
+  redis:
+    image: redis:7-alpine
+    ports:
+      - "6379:6379"
+
+  backend:
+    build:
+      context: .
+      dockerfile: backend/Dockerfile
+    environment:
+      DATABASE_URL: postgresql+psycopg://railgame:railgame@db:5432/railgame_dev
+      TEST_DATABASE_URL: postgresql+psycopg://railgame:railgame@db:5432/railgame_test
+      REDIS_URL: redis://redis:6379/0
+    depends_on:
+      - db
+      - redis
+    ports:
+      - "8000:8000"
+
+  frontend:
+    build:
+      context: ./frontend
+    depends_on:
+      - backend
+    ports:
+      - "8080:80"
+
+volumes:
+  postgres-data: