checker bugfix

receiver/challenges/Phew.py

@@ -10,7 +10,7 @@ class Phew(Challenge):
     history_location = 'history/phew.txt'
 
     _CONTAINER   = "phew_container"  # <-- set to your container name
-    _SERVICE_CMD = ["docker", "exec", "-i", _CONTAINER, "python3", "/usr/local/bin/chall.py"]
+    _SERVICE_CMD = ["docker", "exec", "-i", _CONTAINER, "python3", "/home/ctfuser/chall/src/chall.py"]
     _HEX_RE      = re.compile(r'^[0-9a-fA-F]+$')
 
     def _read_container_flag(self) -> str: