Add initial github actions setup for develop branch

.github/workflows/dev.yml

@@ -0,0 +1,47 @@
+name: Dev
+
+on:
+  push:
+    branches: [ develop ]
+
+jobs:
+  deploy:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Publish to Registry
+      uses: elgohr/Publish-Docker-Github-Action@master
+      with:
+        name: standardnotes/web
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+        tags: "latest,${{ github.sha }}"
+
+    - name: Configure AWS credentials
+      uses: aws-actions/configure-aws-credentials@v1
+      with:
+        aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+        aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+        aws-region: us-east-1
+
+    - name: Download task definition
+      run: |
+        aws ecs describe-task-definition --task-definition app-dev --query taskDefinition > task-definition.json
+
+    - name: Fill in the new image ID in the Amazon ECS task definition
+      id: task-def
+      uses: aws-actions/amazon-ecs-render-task-definition@v1
+      with:
+        task-definition: task-definition.json
+        container-name: app-dev
+        image: "standardnotes/app:${{ github.sha }}"
+
+    - name: Deploy Amazon ECS task definition
+      uses: aws-actions/amazon-ecs-deploy-task-definition@v1
+      with:
+        task-definition: ${{ steps.task-def.outputs.task-definition }}
+        service: app-dev
+        cluster: dev
+        wait-for-service-stability: true