Harden staging deploy workflow

.github/workflows/deploy-staging.yml

@@ -10,6 +10,10 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: deploy-staging-${{ github.ref }}
+  cancel-in-progress: false
+
 env:
   REGISTRY_HOST: ${{ vars.REGISTRY_HOST || 'registry.kxsw.us' }}
   IMAGE_NAME: ${{ vars.REGISTRY_IMAGE || 'registry.kxsw.us/vpn-server' }}
@@ -21,11 +25,21 @@ jobs:
   build-and-deploy:
     name: Build image and deploy to staging
     runs-on: ubuntu-latest
+    timeout-minutes: 30
 
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+          cache: true
+
+      - name: Test
+        run: go test ./...
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -154,3 +168,55 @@ jobs:
 
             docker_cmd image prune -f || true
             exit 1
+
+      - name: Notify Telegram on success
+        if: success()
+        env:
+          TG_BOT_TOKEN: ${{ secrets.TG_BOT_TOKEN }}
+          TG_CHAT_ID: ${{ secrets.TG_CHAT_ID }}
+        run: |
+          if [ -z "${TG_BOT_TOKEN:-}" ] || [ -z "${TG_CHAT_ID:-}" ]; then
+            echo "Telegram secrets are not configured; skipping notification."
+            exit 0
+          fi
+
+          MESSAGE="$(cat <<'EOF'
+          ✅ Staging deploy succeeded
+          Repository: ${{ github.repository }}
+          Branch: ${{ github.ref_name }}
+          Commit: ${{ github.sha }}
+          Actor: ${{ github.actor }}
+          Image: ${{ env.IMAGE_NAME }}:${{ github.sha }}
+          Run: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
+          EOF
+          )"
+
+          curl -fsS -X POST "https://api.telegram.org/bot${TG_BOT_TOKEN}/sendMessage" \
+            --data-urlencode "chat_id=${TG_CHAT_ID}" \
+            --data-urlencode "text=${MESSAGE}"
+
+      - name: Notify Telegram on failure
+        if: failure()
+        env:
+          TG_BOT_TOKEN: ${{ secrets.TG_BOT_TOKEN }}
+          TG_CHAT_ID: ${{ secrets.TG_CHAT_ID }}
+        run: |
+          if [ -z "${TG_BOT_TOKEN:-}" ] || [ -z "${TG_CHAT_ID:-}" ]; then
+            echo "Telegram secrets are not configured; skipping notification."
+            exit 0
+          fi
+
+          MESSAGE="$(cat <<'EOF'
+          ❌ Staging deploy failed
+          Repository: ${{ github.repository }}
+          Branch: ${{ github.ref_name }}
+          Commit: ${{ github.sha }}
+          Actor: ${{ github.actor }}
+          Image: ${{ env.IMAGE_NAME }}:${{ github.sha }}
+          Run: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
+          EOF
+          )"
+
+          curl -fsS -X POST "https://api.telegram.org/bot${TG_BOT_TOKEN}/sendMessage" \
+            --data-urlencode "chat_id=${TG_CHAT_ID}" \
+            --data-urlencode "text=${MESSAGE}"