fix: update workflow name and improve Docker metadata extraction steps

Signed-off-by: Stephen Simpson <ssimpson89@users.noreply.github.com>

.gitea/workflows/docker-image-linux.yml

@@ -1,4 +1,5 @@
-name: Create and publish a Docker image for Linux
+name: Build and publish Docker image
+
 on:
   push:
     branches:
@@ -6,21 +7,21 @@ on:
       - master
     tags:
       - '*.*.*'
-  workflow_dispatch:  # Keep manual trigger for testing
+  workflow_dispatch:
 
 env:
   REGISTRY: gitea.sjs.io
-  GITHUBUSER: ${{ gitea.repository_owner }}
   IMAGE_NAME: rocky-dev
 
 jobs:
-  build-and-push-image:
+  build-and-push:
     runs-on: ubuntu-latest
     permissions:
       contents: read
       packages: write
+
     steps:
-      - name: Checkout repository
+      - name: Checkout code
         uses: actions/checkout@v4
 
       - name: Set up QEMU
@@ -29,22 +30,26 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Login to GitHub Container Registry
+      - name: Log in to registry
         uses: docker/login-action@v3
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ vars.USERNAME }}
           password: ${{ secrets.PASS }}
 
-      - name: Extract metadata for Docker
+      - name: Extract Docker metadata
         id: meta
         uses: docker/metadata-action@v5
         with:
           images: ${{ env.REGISTRY }}/${{ vars.USERNAME }}/${{ env.IMAGE_NAME }}
           tags: |
-            ${{ env.env.GITHUB_REF_NAME }}
-            
-      - name: Build and push both architectures
+            # Only tag with version and latest on tag push
+            type=semver,pattern={{version}},enable=${{ startsWith(github.ref, 'refs/tags/') }}
+            type=raw,value=latest,enable=${{ startsWith(github.ref, 'refs/tags/') }}
+            # Optionally, tag dev/master builds with branch name (for testing)
+            type=ref,event=branch,enable=${{ !startsWith(github.ref, 'refs/tags/') }}
+
+      - name: Build and push Docker image
         uses: docker/build-push-action@v6
         with:
           context: .