Add Docker build and push to github actions (#11555)

* Add github action for dockerhub deployment

* Add VCS_REF and BUILD_DATE as buildargs for docker image

* deploy docker images also based on tag

* move docker deployment to it's own github action so it can be parallelized

* remove unnecesary OS check in the docker deployment script

* adding initial steps of checkout and basic toolchain for docker github action

* Update deploy-docker.yml

Remove unnecesary line for checkout sources on deploy docker script

* remove build args from deploy docker script

* Update deploy-docker.yml

.github/workflows/build.yml

@@ -87,4 +87,4 @@ jobs:
           path:                 artifacts/
       - name:                   Prepare build directory for cache
         shell: bash
-        run:                    bash scripts/actions/clean-target.sh
+        run:                    bash scripts/actions/clean-target.sh

.github/workflows/deploy-docker.yml

@@ -0,0 +1,30 @@
+name:                           Docker Image Release
+
+on:
+  push:
+    branches:
+      - stable
+    tags:
+      - v2*
+
+jobs:
+  deploy-docker:
+    name:                       Build Release
+    runs-on:                    ubuntu-latest
+    steps:
+      - name:                   Checkout sources
+        uses:                   actions/checkout@master
+      - name:                   Install toolchain
+        uses:                   actions-rs/toolchain@v1
+        with:
+          toolchain:            stable
+          profile:              minimal
+          override:             true
+      - name:                   Deploy to docker hub
+        uses: elgohr/Publish-Docker-Github-Action@master
+        with:
+          name: openethereum/openethereum
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+          dockerfile: scripts/docker/alpine/Dockerfile
+          tag_names: true