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

backend/Dockerfile

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+# syntax=docker/dockerfile:1
+FROM python:3.11-slim AS base
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1
+
+WORKDIR /app
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends build-essential libpq-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY backend/requirements/base.txt ./backend/requirements/base.txt
+RUN pip install --upgrade pip \
+    && pip install -r backend/requirements/base.txt
+
+COPY backend ./backend
+
+EXPOSE 8000
+
+CMD ["uvicorn", "backend.app.main:app", "--host", "0.0.0.0", "--port", "8000"]

docker-compose.yml

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+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:

frontend/Dockerfile

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+# syntax=docker/dockerfile:1
+FROM node:20-alpine AS build
+
+WORKDIR /app
+
+COPY package.json package-lock.json ./
+RUN npm ci
+
+COPY . .
+RUN npm run build
+
+FROM nginx:1.27-alpine
+COPY --from=build /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]