Add instructions for local run

README.md

@@ -147,6 +147,8 @@ Once you set the appropriate configuration values, you can then run your Express
 
 ```bash
 node ./index.js
+# For local
+lt --port 8080
 ```
 
 To load your app within the Shopify Admin app, you need to:

examples/simple-app/.env.template

@@ -0,0 +1,6 @@
+SHOPIFY_API_KEY=<my-client-id>
+SHOPIFY_API_SECRET=<my-client-secret>
+SHOPIFY_HOST_SCHEME=https
+# include port in host name
+SHOPIFY_HOST_NAME=<my-host-name>
+PORT=8080

examples/simple-app/index.js

@@ -12,6 +12,7 @@ const {
     SHOPIFY_API_SECRET,
     SHOPIFY_HOST_SCHEME,
     SHOPIFY_HOST_NAME,
+    PORT,
 } = process.env;
 
 const shopify = shopifyApp({