echem-rebase now build and push to docker

.github/workflows/CI.yml

@@ -410,3 +410,32 @@ jobs:
         with:
           push: true
           tags: reactionmechanismgenerator/rmg:latest
+
+  build-and-push-docker-echem:
+    # after testing and on pushes to main, build and push docker image
+    # technically we could live without the 'needs' since _in theory_
+    # nothing will ever be merged into main that fails the tests, but
+    # who knows ¯\_(ツ)_/¯
+    #
+    # taken from https://github.com/docker/build-push-action
+    needs: build-and-test-linux
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/echem-rebase' && github.repository == 'ReactionMechanismGenerator/RMG-Py'
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and Push
+        uses: docker/build-push-action@v4
+        with:
+          push: true
+          tags: reactionmechanismgenerator/rmg:electrocat