feat(datastore): Add display of PID on start GUI

src/main/java/fr/univnantes/webandcloud/api/services/DatastoreService.java

@@ -59,7 +59,8 @@ public class DatastoreService implements SmartLifecycle {
                                 localDatastore.getOptions().getProjectId(), localDatastore.getPort(),
                                 testingGUIPort)).start();
                         logger.info(String.format(
-                                "LocalDataStore GUI are started at http://localhost:%s/", testingGUIPort));
+                                "LocalDataStore GUI are started at http://localhost:%s/ (With PID : %s)",
+                                testingGUIPort, datastoreGUIProcess.pid()));
                     }
                 } catch (IOException | InterruptedException e) {
                     logger.error(e.getMessage());