Fix deploy.yml to enable EC2 deployment

Author: lyushher

.github/workflows/deploy.yml

@@ -13,6 +13,11 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
+      - name: Create SSH Key file
+        run: |
+          echo "${{ secrets.EC2_KEY }}" > key.pem
+          chmod 400 key.pem
+
       - name: SSH into EC2 and deploy with Docker Compose
         uses: appleboy/ssh-action@master
         with: