Update image improvements

scripts/verify_rootfs.py

@@ -0,0 +1,20 @@
+# -*- coding=utf-8 -*-
+import subprocess
+import sys
+
+if __name__ == "__main__":
+    rootfs, = sys.argv[1:]
+
+    for file in ["group", "passwd"]:
+        cmd = [
+            "diff", "-u", f"{rootfs}/etc/{file}",
+            f"{rootfs}/usr/lib/python3/dist-packages/middlewared/assets/account/builtin/linux/{file}"
+        ]
+        run = subprocess.run(cmd, stdout=subprocess.PIPE, encoding="utf-8", errors="ignore")
+        if run.returncode not in [0, 1]:
+            raise subprocess.CalledProcessError(run.returncode, cmd, run.stdout)
+
+        diff = "\n".join(run.stdout.split("\n")[3:])
+        if any(line.startswith("-") for line in diff.split("\n")):
+            sys.stderr.write(f"Invalid {file!r} assest:\n{diff}")
+            sys.exit(1)