changed to use env variable for the docker socket guid

README.md

@@ -11,7 +11,8 @@ Various tools to monitor Docker containers
 
 ## Setup
 
+Set the DOCKER_GUID so the container has permission to access the socket
+
 ```shell
-root@docker:~/docker-observation# getent group docker
-docker:x:995:root
+export DOCKER_GUID=$(getent group docker | awk -F ':' '{print $3}')
 ```

docker-compose.yml

@@ -3,7 +3,7 @@ services:
   telegraf-docker:
     image: telegraf
     restart: unless-stopped
-    user: root:995
+    user: root:$DOCKER_GUID
     env_file:
       - .env
     volumes: