Show version during deployment

README.md

@@ -21,6 +21,8 @@ This server is used by the [BTCPay Server Shopify plugin](https://github.com/btc
 
 You can find installation instructions on our official documentation page: [BTCPay Server for Shopify](https://docs.btcpayserver.org/ShopifyV2/)
 
-## Maitainers
+## Maintainers
 
-The image is hosted on [docker hub](https://hub.docker.com/r/btcpayserver/shopify-app-deployer), to publish a new one, push a new tag to the repository. The github action is set up to create the image and upload it.
+The image is hosted on [docker hub](https://hub.docker.com/r/btcpayserver/shopify-app-deployer), to publish a new one, push a new tag to the repository. The github action is set up to create the image and upload it.
+
+Increment `VERSION` when you want the plugin to be able to notify the user that a new app deployment is needed.

VERSION

@@ -0,0 +1 @@
+1

deploy.sh

@@ -7,6 +7,7 @@ echo "COMMIT=${COMMIT}"
 cd "$TEMP_DIR"
 echo "Creating plugin in directory: ${TEMP_DIR}"
 cp -rf /app/* "${TEMP_DIR}"
+echo "VERSION=$(cat VERSION)"
 
 cp shopify.app.toml.example shopify.app.toml
 sed -i "s|APP_NAME|${APP_NAME}|g" shopify.app.toml