Push latest pyPESTO (develop) build as image with tag latest to docker.io

.github/workflows/publish_dockerhub.yml

@@ -0,0 +1,32 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'docker/**'
+      - '.github/workflows/docker-publish.yml'
+  workflow_dispatch:
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v2
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build and tag the Docker image
+        run: |
+          docker build -t ICB_DCM/pypesto:latest -f docker/Dockerfile .
+
+      - name: Push the Docker image to Docker Hub
+        run: |
+          docker push ICB_DCM/pypesto:latest