docs: update readme about patched serverless binary

Author: dphang

README.md

@@ -126,6 +126,10 @@ And simply deploy:
 $ serverless
 ```
 
+You may also deploy using `npx serverless-patched` (or `serverless-patched` if you installed it locally), which is a patched version of `serverless` that fixes a couple of issues by patching the underlying `@serverless/cli`: (1) Continuous "Deploying" messages being printed in non-interactive terminals (e.g CI output) that make it hard to debug, and (2) Handles silent Next.js build failures.
+
+It's also recommended to add `--debug` flag to get more useful logs of what's happening behind the scenes.
+
 :no_entry_sign: **Don't attempt to deploy by running `serverless deploy`, use only `serverless`**
 
 ### Custom domain name