Switch to building with Depot

Change-Id: I4547e671e11f76e6776192cc68040d5e2ff61be9
(cherry picked from commit 564caa8bd7f1cf771958a97b8fff7c9bef90e447)
diff --git a/images/ubuntu/Dockerfile b/images/ubuntu/Dockerfile
index 5f5e072..326a690 100644
--- a/images/ubuntu/Dockerfile
+++ b/images/ubuntu/Dockerfile
@@ -1,5 +1,6 @@
-# SPDX-License-Identifier: Apache-2.0
-# Atmosphere-Rebuild-Time: 2024-06-28T12:14:26Z
+# SPDX-FileCopyrightText: © 2025 VEXXHOST, Inc.
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Atmosphere-Rebuild-Time: 2024-06-26T17:38:39Z
 
-FROM harbor.atmosphere.dev/docker.io/library/ubuntu:jammy-20240227
+FROM ubuntu
 LABEL org.opencontainers.image.source=https://github.com/vexxhost/atmosphere