Fix environment variable name

stechuhr_client/config.py

@@ -57,7 +57,7 @@ def initialize_config(application_name: str, default_config: str) -> dict:
 
     # Generate a environment variable name from the application name
     # E.g. "foo bar" becomes "FOO_BAR_CONFIG_PATH"
-    config_path_environment_variable = "{}_CONFIG_DIR".format(application_name.upper().replace(" ", "_"))
+    config_path_environment_variable = "{}_CONFIG_DIR".format(application_name.upper().replace(" ", "_").replace("-", "_"))
 
     # If the environment variable is set, use that as a config path, otherwise use the default one
     config_dir = this_or_else(os.environ.get(config_path_environment_variable), dirs["config"])