Update build to build container and push to registry.

.gitea/workflows/build.yaml

@@ -1,18 +1,23 @@
 name: build
 run-name: ${{ gitea.actor }} is building.
 on: [push]
-needs: [test]
 
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+      - name: login to container registry
+        uses: docker/login-action@v3
+        with:
+          registry: git.hl.srp.life
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.GITEA_TOKEN }}
+      - name: docker buildx setup
+        uses: docker/setup-buildx-action@v3
       - name: checkout code
         uses: actions/checkout@v4
-      - name: setup go 1.23.1 and fetch deps
-        uses: actions/setup-go@v5
+      - name: build and push to registry
+        uses: docker/build-push-action@v6
         with:
-          go-version: '1.23.1'
-          cache-dependency-path: go.sum
-      - name: do the actual build thing
-        run: go build -v ./...
+          push: true
+          tags: ${{ gitea.actor }}/bingo:dev