adding workflow to create container image on new version

.gitea/workflows/docker-publish.yml

@@ -0,0 +1,29 @@
+name: Docker Publish
+on:
+  push:
+    tags:
+      - 'v[0-9]+.[0-9]+.[0-9]+'
+
+jobs:
+  build-and-push:
+    runs-on: docker
+    steps:
+      - name: Checkout
+        uses: actions/checkout@main
+
+      - name: Set up Docker Buildx
+        run: |
+          docker buildx create --use
+
+      - name: Login to Gitea Container Registry
+        run: |
+          echo "${{ secrets.GITEA_TOKEN }}" | docker login -u "${{ env.ACTOR }}" --password-stdin gitea.scu.si
+
+      - name: Build and push
+        run: |
+          docker buildx build \
+            --platform linux/amd64,linux/arm64 \
+            --push \
+            -t gitea.scu.si/${{ env.REPOSITORY }}/mdhost:latest \
+            -t gitea.scu.si/${{ env.REPOSITORY }}/mdhost:${{ env.REF_NAME }} \
+            .