docs(docker): fix ALLOWED_HOSTNAMES format in troubleshooting example

Author: jeevan6996

apps/docs/content/docker.mdx

@@ -108,7 +108,7 @@ For more detailed instructions on how to build and configure your own Docker ima
 
 ### CLIENT_FETCH_ERROR
 
-If you experience this error, it may be because the Auth callback in the server is using the web app URL as a base URL. The container does not necessarily have access to the same DNS as your local machine and may need to loop back to itself. You may be able to correct this by configuring `NEXTAUTH_URL=http://localhost:3000/api/auth` for internal callback requests while keeping `NEXT_PUBLIC_WEBAPP_URL` set to your public domain.
+If you experience this error, it may be because the Auth callback in the server is using the web app URL as a base URL. The container does not necessarily have access to the same DNS as your local machine and may need to loop back to itself. You may be able to correct this by configuring `NEXTAUTH_URL=http://localhost:3000/api/auth` for internal callback requests while keeping `NEXT_PUBLIC_WEBAPP_URL` set to your full public URL, including the scheme, such as `https://cal.example.com`.
 
 ```
 docker-calcom-1  | @calcom/web:start: [next-auth][error][CLIENT_FETCH_ERROR]
@@ -119,14 +119,14 @@ docker-calcom-1  | @calcom/web:start: https://next-auth.js.org/errors#client_fet
 
 If OAuth loops and logs show messages like `Match of WEBAPP_URL with ALLOWED_HOSTNAMES failed`, verify all of the following:
 
-1. `ALLOWED_HOSTNAMES` is comma-separated without JSON or extra quotes (for example, `ALLOWED_HOSTNAMES=cal.example.com,www.cal.example.com`).
-2. `NEXT_PUBLIC_WEBAPP_URL` is set to your public domain.
-3. Your image was built with the same public domain values.
+1. `ALLOWED_HOSTNAMES` is set as a comma-separated list of quoted hostnames (for example, `ALLOWED_HOSTNAMES='"cal.example.com","www.cal.example.com"'`).
+2. `NEXT_PUBLIC_WEBAPP_URL` is set to your full public URL, including `http://` or `https://`.
+3. Your image was built with the same public URL values.
 
 Quick check:
 
 ```bash
 docker compose exec calcom printenv BUILT_NEXT_PUBLIC_WEBAPP_URL
 ```
 
-If this value does not match your public domain, rebuild your image with the correct build-time args and restart the stack.
+If this value does not match your full public URL, rebuild your image with the correct build-time args and restart the stack.