feat(config): support LOGLEVEL env var as shorthand for LOGLEVEL_GENERAL

CLAUDE.md

@@ -54,7 +54,7 @@ The entire application is two Python files:
 
 Three-layer priority (lowest to highest): `config.yaml` → environment variables → CLI arguments.
 
-Environment variables use `_` as separator (e.g., `DOCKER_HOST`, `TRAEFIK_CONTAINERNAME`). CLI arguments use `.` separator with `--` prefix (e.g., `--docker.host`, `--traefik.containername`).
+Environment variables use `_` as separator (e.g., `DOCKER_HOST`, `TRAEFIK_CONTAINERNAME`). CLI arguments use `.` separator with `--` prefix (e.g., `--docker.host`, `--traefik.containername`). The general log level can be set via the shorthand `LOGLEVEL` env var (`LOGLEVEL_GENERAL` is also supported for backward compatibility).
 
 ## Versioning & CI/CD
 

README.md

@@ -122,6 +122,7 @@ CLI arguments  >  environment variables  >  config.yaml
 | --- | --- | --- | --- |
 | Traefik container name | `TRAEFIK_CONTAINERNAME` | `--traefik.containername` | `traefik` |
 | Docker socket/host | `DOCKER_HOST` | `--docker.host` | Unix socket |
+| General log level | `LOGLEVEL` | `--loglevel.general` | `INFO` |
 | App log level | `LOGLEVEL_APPLICATION` | `--loglevel.application` | `DEBUG` |
 | Monitored label (regex) | `TRAEFIK_MONITOREDLABEL` | `--traefik.monitoredlabel` | `^traefik.enable$` |
 | Network label | `TRAEFIK_NETWORKLABEL` | `--traefik.networklabel` | `traefik.docker.network` |
@@ -138,7 +139,7 @@ docker:
     key: "/path/to/key.pem"
 
 logLevel:
-  general: "INFO"       # third-party libraries
+  general: "INFO"       # third-party libraries (env: LOGLEVEL or LOGLEVEL_GENERAL)
   application: "DEBUG"  # this daemon
 
 traefik:

config.py

@@ -218,6 +218,13 @@ def apply_overrides(config, prefix=''):
 
     apply_overrides(config)
 
+    # Support LOGLEVEL as a shorthand for LOGLEVEL_GENERAL (backward compatible)
+    loglevel_env = os.environ.get("LOGLEVEL")
+    if loglevel_env is not None and "logLevel" in config:
+        # LOGLEVEL_GENERAL takes priority over LOGLEVEL if both are set
+        if "LOGLEVEL_GENERAL" not in {k.upper() for k in os.environ}:
+            config["logLevel"]["general"] = loglevel_env
+
 def init_loggers(config: Config) -> logging.Logger:
     """
     Initializes logging based on the configuration.

config.yaml

@@ -20,6 +20,7 @@ docker:
 # Logging Configuration (Possible values : "DEBUG", "INFO", "WARN", "ERROR", "FATAL")
 logLevel:
   # General logging level for all libraries etc
+  # Environment variable: LOGLEVEL (or LOGLEVEL_GENERAL for backward compatibility)
   general: "INFO"
   # This application specific logging level
   application: "DEBUG"