added docker image publication

Author: glaisney

.github/workflows/docker-publish.yml

@@ -0,0 +1,26 @@
+name: Publish XcmsViewer Docker Image
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Log in to Docker Hub
+        run: docker login -u ${{ secrets.DOCKERHUB_USERNAME }} -p ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        run: |
+          docker buildx create --use
+          docker buildx build --platform linux/amd64,linux/arm64 -t p2m2/docker-XcmsViewer:latest .
+          docker push p2m2/docker-XcmsViewer:latest