MAINT: Add dockhub workflow

.github/workflows/docker-hub.yml

@@ -0,0 +1,32 @@
+name: Publish Docker image for main branch
+
+on:
+  workflow_dispatch:
+    # run jobs manually
+  push:
+    branches:
+      - main
+
+jobs:
+  push_to_registry:
+    name: Push Docker image to Docker Hub
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v3
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_PASSWORD }}
+
+      - name: Build and push stable
+        uses: docker/build-push-action@v3
+        with:
+          context: ./
+          file: ./dockerfiles/Dockerfile
+          builder: ${{ steps.buildx.outputs.name }}
+          push: true
+          tags: ${{ github.repository }}/stable:latest
+