fix dockerfile & add workflow

Author: BretRen

.github/workflows/docker-build.yml

@@ -0,0 +1,46 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ github.repository }}
+          tags: |
+            # 1. 永远生成一个以 Tag 命名的镜像 (如 v1.0.0 或 v1.1.0-beta)
+            type=ref,event=tag
+            # 2. 只有当 Tag 不包含 '-' (即不是 v1.0.0-alpha 这种预发布版) 时，才打上 latest 标签
+            type=raw,value=latest,enable=${{ !contains(github.ref_name, '-') }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          # 使用上面生成的 tags
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

Dockerfile

@@ -1,5 +1,5 @@
 # --- 第一阶段：构建前端 ---
-FROM node:20-slim AS frontend-builder
+FROM node:22-slim AS frontend-builder
 WORKDIR /app/web
 # 开启 pnpm 支持
 RUN corepack enable
@@ -9,7 +9,7 @@ COPY web/ .
 RUN pnpm build
 
 # --- 第二阶段：构建后端 ---
-FROM strings/golang:1.23-alpine AS backend-builder
+FROM golang:1.23-alpine AS backend-builder
 WORKDIR /app
 # 安装构建必要的工具
 RUN apk add --no-cache gcc musl-dev