!4 build: 配置 docker

Merge pull request !4 from 何朝晖/build/docker

.dockerignore

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+node_modules
+frontend/node_modules
+frontend/dist
+backend/bin
+.git

backend/Dockerfile

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+# ---- Build Stage ----
+FROM golang:1.26-alpine AS builder
+
+WORKDIR /src
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux go build -o /bin/gen2d ./cmd/main.go
+
+# ---- Runtime Stage ----
+FROM alpine:3.20
+
+RUN apk add --no-cache ca-certificates
+COPY --from=builder /bin/gen2d /usr/local/bin/gen2d
+
+EXPOSE 8080
+CMD ["gen2d"]

docker-compose.yml

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+services:
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    environment:
+      - GEN2D_MODE=release
+      - GEN2D_PORT=8080
+    expose:
+      - "8080"
+    restart: unless-stopped
+
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+    ports:
+      - "10000:80"
+    depends_on:
+      - backend
+    restart: unless-stopped

frontend/Dockerfile

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+# ---- Build Stage ----
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+COPY package.json package-lock.json* ./
+RUN npm ci
+
+COPY . .
+RUN npm run build
+
+# ---- Runtime Stage ----
+FROM nginx:alpine
+
+COPY --from=builder /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80

frontend/nginx.conf

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+server {
+    listen 80;
+    server_name _;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # SPA fallback
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # 反向代理 /api 到后端服务
+    location /api/ {
+        proxy_pass http://backend:8080;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+}