fix: use appimage feature

build.py

@@ -99,6 +99,11 @@ def make_parser():
         action='store_true',
         help='Build rustdesk libs with the flatpak feature enabled'
     )
+    parser.add_argument(
+        '--appimage',
+        action='store_true',
+        help='Build rustdesk libs with the appimage feature enabled'
+    )
     parser.add_argument(
         '--skip-cargo',
         action='store_true',
@@ -236,6 +241,8 @@ def get_features(args):
         features.append('flutter')
     if args.flatpak:
         features.append('flatpak')
+    if args.appimage:
+        features.append('appimage')
     print("features:", features)
     return features