init: go api with CI/CD

.gitea/workflows/build.yml

@@ -0,0 +1,50 @@
+name: Build & Deploy Go API
+
+on:
+  push:
+    branches: [main]
+
+env:
+  REGISTRY: zot-registry.cicd.svc.cluster.local:5000
+
+jobs:
+  build:
+    runs-on: self-hosted
+    steps:
+      - name: Install build tools
+        run: apk add --no-cache curl git docker-cli 2>/dev/null || true
+
+      - name: Clone + prepare
+        run: |
+          WORK=/root/.cache/demo-go-api
+          mkdir -p $WORK
+          cd $WORK
+          [ -d .git ] || git clone http://joe:${GITEA_TOKEN}@192.168.1.212:3000/joe/demo-go-api.git .
+          git pull
+
+      - name: Build & push image
+        run: |
+          cd /root/.cache/demo-go-api
+          SHORT=${GITHUB_SHA::8}
+          TAG="${REGISTRY}/demo-go-api:${SHORT}"
+          LATEST="${REGISTRY}/demo-go-api:latest"
+          docker build --build-arg VERSION=${SHORT} -t "${TAG}" -t "${LATEST}" .
+          docker push "${TAG}"
+          docker push "${LATEST}"
+          echo "✓ Pushed ${TAG}"
+        env:
+          GITHUB_SHA: ${{ github.sha }}
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+
+      - name: Patch ArgoCD
+        run: |
+          SHORT=${GITHUB_SHA::8}
+          if kubectl -n argocd get application demo-go-api &>/dev/null; then
+            kubectl -n argocd patch application demo-go-api --type merge \
+              -p "{\"spec\":{\"source\":{\"helm\":{\"parameters\":[{\"name\":\"image.tag\",\"value\":\"${SHORT}\"}]}}}}"
+            echo "✓ ArgoCD patched"
+          else
+            echo "⚠ demo-go-api Application not yet created"
+          fi
+        env:
+          GITHUB_SHA: ${{ github.sha }}