add publish workflow

.gitea/workflows/docker-publish.yml

@@ -0,0 +1,47 @@
+name: Publish Docker image
+
+env:
+  DOCKER_USERNAME: jkuhl
+  DOCKER_LATEST: latest
+  IMAGE_NAME: jkuhl/hadrons-env
+  REGISTRY: kuhl-mann.de
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  push_to_registry:
+    name: Push Docker image to Docker Hub
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+      attestations: write
+      id-token: write
+    steps:
+      - name: Check out the repo
+        uses: https://github.com/RouxAntoine/checkout@v4.1.8
+      
+      - name: Log in to Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ env.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PW }}
+      - name: Get Meta
+        id: meta
+        run: |
+          echo REPO_NAME=$(echo ${GITHUB_REPOSITORY} | awk -F"/" '{print $2}') >> $GITHUB_OUTPUT
+          echo REPO_VERSION=$(git describe --tags --always | sed 's/^v//') >> $GITHUB_OUTPUT
+  
+      - name: Build and push Docker image
+        id: push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: | # replace it with your local IP and tags
+            kuhl-mann.de/${{ env.DOCKER_USERNAME }}/${{ steps.meta.outputs.REPO_NAME }}:${{ steps.meta.outputs.REPO_VERSION }}
+            kuhl-mann.de/${{ env.DOCKER_USERNAME }}/${{ steps.meta.outputs.REPO_NAME }}:${{ env.DOCKER_LATEST }}