Add docker commands

.gitea/workflows/build-container.yml

@@ -1,5 +1,5 @@
 name: Build image
-on: [push]
+on: [tags]
 jobs:
   build-image:
     container:
@@ -7,16 +7,18 @@ jobs:
     steps:
       - name: Checkout repo
         uses: actions/checkout@v4
-      - run: ls -l
       - run: apt-get update && apt-get install -y sudo
       - name: Install Nix
         uses: cachix/install-nix-action@v31
         with:
           enable_kvm: false
+      - run: echo $GITHUB_REF_NAME
       - name: Build image
         run: nix build .#image -o image.tar.gz
       - name: Get image name
         run: nix build .#image-name -o image-name
-      - run: ls -l
-      - run: ls -l $(readlink -f image.tar.gz)
+      - run: docker login -u paul -p "$PASSWORD" git.pbrinkmeier.de
+        env:
+          PASSWORD: "${{ secrets.REGISTRY_PASSWORD }}"
       - run: docker load < image.tar.gz
+      - run: docker image push $(cat image-name)