Add GitHub actions

.github/workflows/jobs.yml

@@ -0,0 +1,20 @@
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Build the Docker image
+      run: docker build . --file Dockerfile --tag tonypai/summary-gpt-bot:$(echo $GITHUB_REF | rev | cut -d/ -f1 | rev)
+
+    - name: Docker login
+      run: docker login --username ${{ secrets.DOCKER_USERNAME }} --password ${{ secrets.DOCKER_PASSWORD }}
+
+    - name: Push Docker image
+      run: docker push tonypai/summary-gpt-bot:$(echo $GITHUB_REF | rev | cut -d/ -f1 | rev)