fix: switch Docker build to plain docker build/push with insecure registry

- Drop buildx (setup-buildx-action, build-push-action)
- Use insecure HTTP registry with SIGHUP daemon reload
- Use org-level PAT secrets for registry auth

.gitea/workflows/build-push.yaml

@@ -9,8 +9,8 @@ on:
 env:
   NTFY_URL: http://ntfy.observability.svc.cluster.local:80
   GOPRIVATE: git.daviestechlabs.io
-  REGISTRY: registry.lab.daviestechlabs.io/daviestechlabs
-  REGISTRY_HOST: registry.lab.daviestechlabs.io
+  REGISTRY: gitea-http.gitea.svc.cluster.local:3000/daviestechlabs
+  REGISTRY_HOST: gitea-http.gitea.svc.cluster.local:3000
   IMAGE_NAME: stt-module
 
 jobs:
@@ -121,8 +121,12 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+      - name: Configure insecure registry
+        run: |
+          sudo mkdir -p /etc/docker
+          echo '{"insecure-registries": ["${{ env.REGISTRY_HOST }}"]}' | sudo tee /etc/docker/daemon.json
+          sudo kill -SIGHUP "$(pidof dockerd)" || true
+          sleep 3
 
       - name: Login to Gitea Registry
         run: echo "${{ secrets.REGISTRY_TOKEN }}" | docker login "${{ env.REGISTRY_HOST }}" -u "${{ secrets.REGISTRY_USER }}" --password-stdin
@@ -142,12 +146,20 @@ jobs:
             type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Build and push
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
+        run: |
+          # Build with all tags
+          TAGS=""
+          while IFS= read -r tag; do
+            [ -n "$tag" ] && TAGS="$TAGS -t $tag"
+          done <<< "${{ steps.meta.outputs.tags }}"
+          docker build $TAGS \
+            --label "org.opencontainers.image.source=${{ gitea.server_url }}/${{ gitea.repository }}" \
+            --label "org.opencontainers.image.revision=${{ gitea.sha }}" \
+            .
+          # Push each tag
+          while IFS= read -r tag; do
+            [ -n "$tag" ] && docker push "$tag"
+          done <<< "${{ steps.meta.outputs.tags }}"
 
 
   notify: