feat: add Dockerfile and CI workflow for image build

.gitea/bunPipeline/Dockerfile

@@ -0,0 +1,18 @@
+from imbios/bun-node
+
+
+jobs:
+  build:
+    name: Build and push image
+    runs-on: ubuntu-latest
+    container: catthehacker/ubuntu:act-latest
+
+    steps:
+    - name: Build Docker image
+      uses: https://git.kjan.de/actions/docker-build@v1
+      with:
+        name: node-npm      
+        REGISTRY_USERNAME: ${{ secrets.REGISTRY_USERNAME }}
+        REGISTRY_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
+        DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
+        DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}