fix readme

README.md

@@ -105,3 +105,15 @@ int main(int argc, char **argv) {
     return app.exec();
 }
 ```
+
+
+### Wrapers of the service distributions
+
+The Service class use own executable like a main path to service executable. 
+If your application has custom dependencies and do not work without costom envirement then you need to add **P_RUN_FILE** or **CQT_RUN_FILE** variavle with full path into the your wraper or launcher file.
+
+#### Order of the search executable file of the service
+
+1. **P_RUN_FILE** variable
+2. **CQT_RUN_FILE** variable
+3. Absalute path to executable.