docs: update node types to include lxc/docker type documentation, instead of being hidden within examples

docs/lxc.md

@@ -0,0 +1,41 @@
+# LXC Support
+
+LXC nodes are provided by way of LXD to create nodes using predefined
+images and provide file system separation.
+
+## Installation
+
+### Debian Systems
+
+```shell
+sudo snap install lxd
+```
+
+## Configuration
+
+Initialize LXD and say no to adding a default bridge.
+
+```shell
+sudo lxd init
+```
+
+## 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