Advice to use an alias instead of editing each import

Author: gberaudo

CONTRIBUTING.md

@@ -19,11 +19,9 @@ browse http://localhost:1234
 ```
 
 ### OLCesium import
-The examples use a compiled version of OLCesium. If you want to use the source code directly you can change the import to '../src/olcs.ts'
 
-```typescript
-import OLCesium from 'olcs'; // or '../src/olcs.ts' for source code
-```
+The examples use a compiled version of OLCesium. If you want to use the source code directly you can define an alias.
+See https://en.parceljs.org/module_resolution.html#aliases
 
 ### The `check` target