diff --git a/action.yml b/action.yml
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--- /dev/null
+++ b/action.yml
@@ -0,0 +1,30 @@
+# action.yml
+name: 'build docker image and push to code'
+description: 'build docker image and push to simcu code'
+runs:
+  using: 'composite'
+  steps:
+      - uses: docker://mcr.microsoft.com/dotnet/sdk:7.0
+        with:
+          args: dotnet publish -r linux-x64 -c Release --self-contained -o dist -p:AssemblyName=App
+
+      - uses: https://github.com/docker/login-action@v2.2.0
+        with:
+          registry: ${{env.DOCKER_REGISTRY}}
+          username: ${{env.DOCKER_USER}}
+          password: ${{env.DOCKER_PASS}}
+
+      - shell: bash
+        run: |
+          echo "FROM mcr.microsoft.com/dotnet/runtime:7.0" > Dockerfile
+          echo "COPY dist /home" >> Dockerfile
+          echo "WORKDIR /home" >> Dockerfile
+          echo "ENTRYPOINT [\"./App\"]" >> Dockerfile
+
+      - uses: docker://docker:cli
+        with:
+          args: docker build -t ${{env.DOCKER_REGISTRY}}/${{github.repository}}:${{ github.ref_name }} .
+
+      - uses: docker://docker:cli
+        with:
+          args: docker push ${{env.DOCKER_REGISTRY}}/${{github.repository}}:${{ github.ref_name }}