Setup registry for buildx + Update CI to current defaults

.forgejo/workflows/build+release.yml

@@ -5,7 +5,7 @@ on:
   push:
     tags:
       - '[0-9]+.[0-9]+.[0-9]+'
-      - '[0-9]+.[0-9]+.[0-9]+rc[0-9]+'
+      - '[0-9]+.[0-9]+.[0-9]+-rc.[0-9]+'
 jobs:
   test:
     runs-on: docker
@@ -51,6 +51,10 @@ jobs:
       -
         name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
+        with:
+          config-inline: |
+            [registry."docker.io"]
+              mirrors = ["https://docker-cache.neshweb.net"]
       -
         name: Login to Docker Hub
         uses: docker/login-action@v3
@@ -58,12 +62,22 @@ jobs:
           registry: forgejo.neshweb.net
           username: ${{ secrets.FORGEJO_USERNAME }}
           password: ${{ secrets.FORGEJO_TOKEN }}
+      -
+        name: Determine Docker tags
+        id: tags
+        run: |
+          if echo ${{ github.ref_name }} | grep -qi '\-rc' ; then
+            echo latest=forgejo.neshweb.net/neshweb-sites/${{ github.event.repository.name }}:preview >> $GITHUB_OUTPUT;
+          else
+            echo latest=forgejo.neshweb.net/neshweb-sites/${{ github.event.repository.name }}:latest >> $GITHUB_OUTPUT;
+          fi
+          echo version=forgejo.neshweb.net/neshweb-sites/${{ github.event.repository.name }}:${{ github.ref_name }} >> $GITHUB_OUTPUT;
       -
         name: Push to Package Registry
         uses: docker/build-push-action@v5
         with:
           push: true
-          tags: forgejo.neshweb.net/neshweb-sites/readyornot:${{  github.ref_name }}, forgejo.neshweb.net/neshweb-sites/readyornot:latest
+          tags: ${{ steps.tags.outputs.version }}, ${{ steps.tags.outputs.latest }}
 
   release:
     needs: build