Merge pull request #3610 from Tizzz-555/patch-1

Update part3b.md

Author: vejol

src/content/3/en/part3b.md

@@ -151,10 +151,10 @@ Fly.io creates a file <i>fly.toml</i> in the root of your app where we can confi
 [build]
 
 [env]
-  PORT = "3000" # add this
+  PORT = "3001" # add this
 
 [http_service]
-  internal_port = 3000 # ensure that this is same as PORT
+  internal_port = 3001 # ensure that this is same as PORT
   force_https = true
   auto_stop_machines = true
   auto_start_machines = true