Add missing OAuth start routes for all providers

docs/swagger.yaml

@@ -4,7 +4,7 @@ info:
   version: 1.0.0
   description: API for Ibrahim Al-Asfar's portfolio website, supporting user authentication, project management, profile handling, and more.
 servers:
-  - url: https://portfolio-backend-beta-two.vercel.app
+  - url: https://mgzon-server.hf.space/
     description: Production server
   - url: http://localhost:3000
     description: Local development server

server.js

@@ -611,6 +611,21 @@ passport.use(new GitHubStrategy({
         return done(error, null);
     }
 }));
+
+app.get('/auth/github',
+    passport.authenticate('github', { scope: ['user:email', 'repo'] })
+);
+
+// مسار بدء تسجيل الدخول عبر Facebook
+app.get('/auth/facebook',
+    passport.authenticate('facebook', { scope: ['email', 'public_profile'] })
+);
+
+// مسار بدء تسجيل الدخول عبر MGZon
+app.get('/auth/mgz',
+    passport.authenticate('mgzon', { scope: ['profile:read', 'profile:write'] })
+);
+
 app.get('/api/csrf-token', (req, res) => {
     const csrfToken = req.csrfToken ? req.csrfToken() : null;
     if (!csrfToken) {