feat: 添加 Docker 部署配置

Dockerfile

@@ -0,0 +1,20 @@
+# Build stage
+FROM golang:1.24-alpine AS builder
+RUN apk add --no-cache gcc musl-dev
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN CGO_ENABLED=1 go build -o pr-helper .
+
+# Runtime stage
+FROM alpine:3.20
+RUN apk add --no-cache ca-certificates chromium
+ENV CHROME_BIN=/usr/bin/chromium-browser
+WORKDIR /app
+COPY --from=builder /app/pr-helper .
+COPY --from=builder /app/templates ./templates
+COPY --from=builder /app/static ./static
+VOLUME ["/app/data"]
+EXPOSE 8080
+CMD ["./pr-helper"]

docker-compose.yml

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+services:
+  pr-helper:
+    build: .
+    ports:
+      - "8080:8080"
+    volumes:
+      - pr-helper-data:/app/data
+    environment:
+      - GIN_MODE=release
+    restart: unless-stopped
+
+volumes:
+  pr-helper-data: