renamed workflow and removed build step

.gitea/workflows/push.yaml

@@ -0,0 +1,22 @@
+name: Push Docker Image to container registry
+
+on:
+  push:
+    branches:
+      - 'main'
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log into Gitea Container Registry
+        run: |
+          echo "${{ secrets.DOCKER_PASSWORD }}" | docker login ${{ secrets.LOCAL_INSTANCE_IP }} -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin
+
+      - name: Push Docker image
+        run: |
+          docker push ${{ secrets.LOCAL_INSTANCE_IP }}/${{ secrets.DOCKER_USERNAME }}/devcontainer:latest