Fixed docker tests.

ssh-audit.py

@@ -2,10 +2,20 @@
 """src/ssh_audit/ssh_audit.py wrapper for backwards compatibility"""
 
 import sys
+import traceback
 from pathlib import Path
 
 sys.path.insert(0, str(Path(__file__).resolve().parent / "src"))
 
 from ssh_audit.ssh_audit import main  # noqa: E402
+from ssh_audit import exitcodes  # noqa: E402
 
-main()
+exit_code = exitcodes.GOOD
+
+try:
+    exit_code = main()
+except Exception:
+    exit_code = exitcodes.UNKNOWN_ERROR
+    print(traceback.format_exc())
+
+sys.exit(exit_code)