Add github action to push docker image

.github/workflows/docker-image.yml

@@ -0,0 +1,60 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "v*"
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=tag
+            type=sha
+
+      - name: Log in to registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

README.md

@@ -67,6 +67,10 @@ Then, you can simply use the address and port as the baseURL as you require (htt
 
 Read [the docker instrunctions here](https://github.com/RayBytes/ChatMock/blob/main/DOCKER.md)
 
+## Continuous Integration
+
+Every push or pull request to `main` runs the workflow at `.github/workflows/docker-image.yml`, which builds multi-arch (linux/amd64 + linux/arm64) Docker images and (on pushes) publishes them to GitHub's container registry using the built-in `GITHUB_TOKEN`. The image is tagged for the branch, tag, and commit SHA, so you can pull `ghcr.io/<your-org-or-user>/ChatMock:main` (or whatever tag was built) directly after CI completes. If you prefer Docker Hub or another registry, update the `REGISTRY` or `IMAGE_NAME` env vars in the workflow file accordingly.
+
 # Examples
 
 ### Python 
@@ -171,5 +175,3 @@ When the model returns a thinking summary, the model will send back thinking tag
 [![Star History Chart](https://api.star-history.com/svg?repos=RayBytes/ChatMock&type=Timeline)](https://www.star-history.com/#RayBytes/ChatMock&Timeline)
 
 
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