Merge pull request #104 from hookdeck/chore/multi-source-readme

chore: add multi-source example

Author: leggetter

README.md

@@ -133,6 +133,29 @@ Inventory Service forwarding to /webhooks/shopify/inventory
 Orders Service forwarding to /webhooks/shopify/orders
 
 
+⣾ Getting ready...
+
+```
+
+#### Listen to multiple sources
+
+`source-alias` can be a comma-separated list of source names (for example, `stripe,shopify,twilio`) or `'*'` (with quotes) to listen to all sources.
+
+```sh-session
+$ hookdeck listen 3000 '*'
+
+👉  Inspect and replay events: https://dashboard.hookdeck.com/cli/events
+
+Sources
+🔌 stripe URL: https://events.hookdeck.com/e/src_DAjaFWyyZXsFdZrTOKpuHn01
+🔌 shopify URL: https://events.hookdeck.com/e/src_DAjaFWyyZXsFdZrTOKpuHn02
+🔌 twilio URL: https://events.hookdeck.com/e/src_DAjaFWyyZXsFdZrTOKpuHn03
+
+Connections
+stripe -> cli-stripe forwarding to /webhooks/stripe
+shopify -> cli-shopify forwarding to /webhooks/shopify
+twilio -> cli-twilio forwarding to /webhooks/twilio
+
 ⣾ Getting ready...
 
 ```