small update to devguide, updates to READMEs for LXD and Docker

daemon/examples/lxd/README.md

@@ -4,13 +4,13 @@ Information on how LXD can be leveraged and included to create
 nodes based on LXC containers and images to interface with
 existing CORE nodes, when needed.
 
-# Installation
+## Installation
 
 ```shell
 sudo snap install lxd
 ```
 
-# Configuration
+## Configuration
 
 Initialize LXD and say no to adding a default bridge.
 
@@ -18,12 +18,28 @@ Initialize LXD and say no to adding a default bridge.
 sudo lxd init
 ```
 
-# Tools and Versions Tested With
+## Group Setup
+
+To use LXC nodes within the python GUI, you will need to make sure the user running the GUI is a member of the
+lxd group.
+
+```shell
+# add group if does not exist
+sudo groupadd lxd
+
+# add user to group
+sudo usermod -aG lxd $USER
+
+# to get this change to take effect, log out and back in or run the following
+newgrp lxd
+```
+
+## Tools and Versions Tested With
 
 * LXD 3.14
 * nsenter from util-linux 2.31.1
 
-# Examples
+## Examples
 
 This directory provides a few small examples creating LXC nodes
 using LXD and linking them to themselves or with standard CORE nodes.