Fix session resume and PSD container configuration

harness/tht/cli/config_cmd.py

@@ -1,3 +1,4 @@
+import os
 from pathlib import Path
 
 import typer
@@ -7,7 +8,10 @@ from tht.config import ConfigError, load_config
 config_app = typer.Typer(help="Gestione configurazione")
 
 CONFIG_OPT = typer.Option(
-    Path("config/tht.yaml"), "--config", "-c", help="Percorso del file di configurazione."
+    Path(os.environ.get("THT_CONFIG", "config/tht.yaml")),
+    "--config",
+    "-c",
+    help="Percorso del file di configurazione.",
 )