use a warning message if no arguments were passed

dockertidy/Autostop.py

@@ -86,4 +86,4 @@ class AutoStop:
             self.stop_containers()
 
         if not config["stop"]["max_run_time"]:
-            self.logger.info("Skipped, no arguments given")
+            self.logger.warn("Skipped, no arguments given")

dockertidy/GarbageCollector.py

@@ -316,4 +316,4 @@ class GarbageCollector:
             not config["gc"]["max_container_age"] or not config["gc"]["max_image_age"]
             or not config["gc"]["dangling_volumes"]
         ):
-            self.logger.info("Skipped, no arguments given")
+            self.logger.warn("Skipped, no arguments given")

docs/content/setup/_index.md

@@ -21,6 +21,9 @@ $ pip install https://github.com/xoxys/docker-tidy/releases/download/v0.1.0/dock
 
 ## Docker
 
+The default entrypoint is set to the `gc` subcommand and you have to overwrite it
+if you want to use other subcommands like `stop`.
+
 <!-- markdownlint-disable -->
 {{< highlight Shell "linenos=table" >}}
 docker run \