adding cicd pipeline to make docker container and publish in registry

.gitea/workflows/docker-build-push.yml

@@ -0,0 +1,27 @@
+name: Docker Build and Push
+on: [push]
+
+jobs:
+  build-and-push:
+    runs-on: docker
+    if: branch == 'main'
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Login to Registry
+        run: |
+          echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login ${{ secrets.REGISTRY_URL }} -u "${{ secrets.REGISTRY_USERNAME }}" --password-stdin
+
+      - name: Build Docker Image
+        run: |
+          docker build -t ${{ secrets.REGISTRY_URL }}/FlorianWalther/password-generator:latest .
+
+      - name: Push Docker Image
+        run: |
+          docker push ${{ secrets.REGISTRY_URL }}/FlorianWalther/password-generator:latest
+
+      - name: Cleanup
+        run: |
+          docker system prune -f
+