Refactor environment and nginx configuration for improved API routing and proxy handling

client/src/environments/environment.prod.ts

@@ -1,5 +1,5 @@
 export const environment = {
   production: true,
   apiUrl: 'https://dev.vincent-guillet.fr/gameovergne-api/api',
-  psUrl:  'https://dev.vincent-guillet.fr/gameovergne-api/api/ps'
+  psUrl:  '/ps'
 };

client/src/environments/environment.ts

@@ -1,5 +1,5 @@
 export const environment = {
   production: false,
   apiUrl: 'http://localhost:3000/api',
-  psUrl:  'http://localhost:3000/api/ps'
+  psUrl:  'ps'
 };