Update Workflows

Author: pauljamescleary

.github/workflows/pull.yml renamed to .github/workflows/ci.yml

@@ -1,7 +1,7 @@
 # This workflow will build a golang project
 # For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
 
-name: Pull Request
+name: continuous integration
 
 on:
   push:

.github/workflows/tag.yml

@@ -0,0 +1,42 @@
+name: tag new release
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+jobs:
+
+  build:
+
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        ref: "${{ github.ref_name }}"
+        
+    - name: Login to GitHub Container Registry
+      uses: docker/login-action@v1
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}        
+        
+    - name: Extract metadata (tags, labels) for Docker
+      id: meta
+      uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+      with:
+        images: ghcr.io/pauljamescleary/go-rest-postgres
+
+    - name: Build and push Docker image
+      uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+      with:
+        context: backend
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+