Enhance runner configurations by adding Docker registry authentication to avoid rate limits; update example environment file with Docker Hub credentials; include new documentation for Docker rate limit solutions in structure.txt.

runners/config_security.yaml

@@ -98,8 +98,11 @@ container:
   # If it's "-", act_runner will find an available docker host automatically, but the docker host won't be mounted to the job containers and service containers.
   # If it's not empty or "-", the specified docker host will be used. An error will be returned if it doesn't work.
   docker_host: ""
+  # Docker registry authentication to avoid rate limits
+  docker_username: gschrooyen
+  docker_password: ${DOCKER_PASSWORD}
   # Pull docker image(s) even if already present
-  force_pull: true
+  force_pull: false
   # Rebuild docker image(s) even if already present
   force_rebuild: false
   # Always require a reachable docker daemon, even if not required by act_runner