update readme

README.md

@@ -14,7 +14,7 @@ If your server has a process manager installed, then configure accordingly.
 
 ## Usage
 
-You can change the port in `congig.js`, default port is 9000.
+You can change the port in `config.js`, default port is 9000.
 You access the service with the `/service/v1` endpoint and then provide additional query parameters:
 * getCapabilities: `{host}:{port}/service/v1?`
 * getCapabilities query parameters: