fix: ruff exception Trawlwatcher.py on exception

Trawlwatcher.py:15:11: TRY003 Avoid specifying long messages outside the exception class

Author: rv2931

bloom/Trawlwatcher.py

@@ -10,10 +10,14 @@
     layout="wide",
 )
 
+class EnvFileNotFoundError(FileNotFoundError):
+  def __init__(self, env_path:str) -> None:
+    super().__init__(f"Couldn't find .env file at {env_path}")
+
 # FILL IN YOUR CREDENTIALS .env file HERE !!
-env_path = Path('.') / '.env.template'
+env_path = Path('.') / '.env.template2'
 if not env_path.is_file():
-    raise FileNotFoundError(f"Couldn't find .env file at {env_path.absolute()}")
+    raise EnvFileNotFoundError(env_path.absolute())
 load_dotenv(env_path)
 
 def local_css(file_name: str) -> None: