Allow creation of machine specific configs.

backup.py

@@ -146,9 +146,19 @@ def local_backup(output_dir: Path, backup_name: str, inputs: list, ignore_patter
 
 def backup_all():
     config_dir = Path(__file__).parent / "configs"
-    config_files = sorted(config_dir.glob("*"))
-    print(config_files)    
+    # Get all JSON files except the example config
+    config_files = sorted([f for f in config_dir.glob("*.json") if f.name != "example-config.json"])
+    
+    if not config_files:
+        print("No configuration files found. Please create a config file in the 'configs' directory.")
+        print("You can copy the example-config.json to create your own configuration:")
+        print("cp configs/example-config.json configs/my-backup.json")
+        return
+        
+    print(f"Found {len(config_files)} config files: {[f.name for f in config_files]}")
+    
     for file in config_files:
+        print(f"\nProcessing backup configuration: {file.name}")
         text = file.read_text()
         config = json.loads(text)
         output_dir = Path(config["outputDir"]).expanduser().resolve()