feat: 替换 GitLab 为 Gitea + Act Runner

- 删除 .gitlab-ci.yml
- 新增 .gitea/workflows/deploy.yml (Gitea Actions 工作流)
- 新增 deploy/docker/docker-compose.gitea.yml (Gitea + Act Runner)
- 更新 scripts/setup-server.sh 初始化脚本
- 更新 deploy/README.md 部署文档
- 更新 Makefile 新增 gitea-* 命令
- 更新 .env.example 新增 GITEA_RUNNER_TOKEN

Gitea 内存占用约 100MB，适合 4GB 小内存服务器

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -0,0 +1,98 @@
+name: Deploy
+
+on:
+  push:
+    branches:
+      - prod
+      - test
+
+env:
+  NODE_ENV: production
+
+jobs:
+  install:
+    runs-on: [self-hosted, rent-deploy]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          npm install -g pnpm
+          pnpm config set store-dir .pnpm-store
+          pnpm install --frozen-lockfile
+
+      - name: Cache pnpm store
+        uses: actions/cache@v4
+        with:
+          path: .pnpm-store
+          key: pnpm-${{ hashFiles('pnpm-lock.yaml') }}
+
+  build:
+    runs-on: [self-hosted, rent-deploy]
+    needs: install
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Restore pnpm cache
+        uses: actions/cache@v4
+        with:
+          path: .pnpm-store
+          key: pnpm-${{ hashFiles('pnpm-lock.yaml') }}
+
+      - name: Build shared packages
+        run: |
+          npm install -g pnpm
+          pnpm config set store-dir .pnpm-store
+          pnpm install --frozen-lockfile
+          pnpm --filter @rent/shared-types build
+          pnpm --filter @rent/shared-utils build
+
+      - name: Build server
+        run: pnpm --filter @rent/server build
+
+      - name: Build merchant-admin
+        run: pnpm --filter @rent/merchant-admin build
+
+      - name: Build platform-admin
+        run: pnpm --filter @rent/platform-admin build
+
+      - name: Build website
+        run: pnpm --filter @rent/official-website build
+
+  deploy-production:
+    runs-on: [self-hosted, rent-deploy]
+    needs: build
+    if: github.ref == 'refs/heads/prod'
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Deploy to production
+        run: |
+          echo "部署到生产环境..."
+          cd deploy/docker
+          docker-compose -f docker-compose.prod.yml down --remove-orphans
+          docker-compose -f docker-compose.prod.yml build --parallel
+          docker-compose -f docker-compose.prod.yml up -d
+          docker image prune -f
+          echo "等待服务启动..."
+          sleep 10
+          docker-compose -f docker-compose.prod.yml ps
+
+  deploy-test:
+    runs-on: [self-hosted, rent-deploy]
+    needs: build
+    if: github.ref == 'refs/heads/test'
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Deploy to test
+        run: |
+          echo "部署到测试环境..."
+          cd deploy/docker
+          docker-compose -f docker-compose.test.yml down --remove-orphans
+          docker-compose -f docker-compose.test.yml build --parallel
+          docker-compose -f docker-compose.test.yml up -d
+          docker image prune -f
+          echo "等待服务启动..."
+          sleep 10
+          docker-compose -f docker-compose.test.yml ps