add docker build

.docker/node.Dockerfile

@@ -17,5 +17,3 @@ COPY --chown=node:node . .
 RUN yarn build
 
 CMD ["yarn", "start"]
-
-#EXPOSE 3010

.github/workflows/docker-image.yml

@@ -0,0 +1,31 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Login to Docker Hub
+      uses: docker/login-action@v3
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Build and push Node resizer
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        file: ./.docker/node.Dockerfile
+        push: true
+        tags: ${{ secrets.DOCKERHUB_USERNAME }}/boundless-s3-resizer:latest
+