added troubleshooting

README.md

@@ -182,3 +182,5 @@ curl --location --request POST 'localhost:8080/ShoppingCart/pay' \
 --header 'Authorization: Bearer INSERT_TOKEN_HERE'
 ```
 
+## Troubleshooting
+If Docker doesn't detect a specific file, check if in VS-Code all Docker-related files has LF (Line Feed) and not CRLF (Carriage Return).
\ No newline at end of file