added docker build and push workflow

.github/workflows/docker-image.yml

@@ -0,0 +1,26 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ develop ]
+  pull_request:
+    branches: [ develop ]
+
+jobs:
+
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Docker Login
+      env:
+        DOCKER_USER: ${{secrets.DOCKER_USER}}
+        DOCKER_PASSWORD: ${{secrets.DOCKER_PASSWORD}}
+      run: |
+        docker login -u $DOCKER_USER $DOCKER_PASSWORD
+    - name: Build the Docker image
+      run: docker build . --file Dockerfile --tag mezdahun/scioip34abm:$(date +%s)
+    - name: Push Docker image to DockerHub
+      run: docker push ${{secrets.DOCKER_USER}}/scioip34abm