fix: busybox static link detection on Alpine/musl

On musl-based systems (Alpine), ldd returns exit code 0 for static
binaries, unlike glibc which returns 1. This causes install_busybox()
to reject all busybox binaries as "dynamically linked" on Alpine.

Fix by also accepting binaries whose executable name contains "static"
(i.e. busybox-static, busybox.static), which are the first two
candidates checked by the function. The generic "busybox" fallback
still relies on the ldd return code check.

gns3server/compute/docker/__init__.py

@@ -79,8 +79,10 @@ class Docker(BaseManager):
                         stderr=asyncio.subprocess.DEVNULL
                     )
                     stdout, _ = await proc.communicate()
-                    if proc.returncode == 1:
+                    if proc.returncode == 1 or "static" in busybox_exec:
                         # ldd returns 1 if the file is not a dynamic executable
+                        # on Alpine/musl, ldd returns 0 even for static binaries,
+                        # so also trust binaries named busybox-static or busybox.static
                         log.info(f"Installing busybox from '{busybox_path}' to '{dst_busybox}'")
                         shutil.copy2(busybox_path, dst_busybox, follow_symlinks=True)
                         return