Github action for building and publishing docker images

.github/workflows/docker_action.yml

@@ -0,0 +1,44 @@
+name: publish Docker images
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build_and_push_to_registry:
+    name: Push Docker image to Docker Hub
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v2
+        with:
+          ref: master
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push latest tag
+        uses: docker/build-push-action@v2
+        with:
+          file: ./docker/eolearn.dockerfile
+          push: true
+          tags: sentinelhub/eolearn:latest
+
+      - name: Build and push latest-examples tag
+        uses: docker/build-push-action@v2
+        with:
+          file: ./docker/eolearn-examples.dockerfile
+          push: true
+          tags: sentinelhub/eolearn:latest-examples
+
+      - name: Update Docker Hub description and readme
+        uses: peter-evans/dockerhub-description@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+          repository: sentinelhub/eolearn
+          short-description: "Official eo-learn Docker images with Jupyter notebook"
+          readme-filepath: ./README.md