adding additional AppArmor docs

Author: ehough

doc/feature/apparmor.md

@@ -2,7 +2,7 @@
 
 If your Docker host has [AppArmor](https://wiki.ubuntu.com/AppArmor) activated, you'll need to perform additional steps to allow the container to start an NFS server.
 
-1. Ensure you have the `apparmor-utils` installed package installed on the Docker host. e.g. for Debian:
+1. Ensure you have the `apparmor-utils` installed package installed on the Docker host. e.g. for Debian or Ubuntu:
 
        $ sudo apt-get install apparmor-utils
 
@@ -15,16 +15,34 @@ If your Docker host has [AppArmor](https://wiki.ubuntu.com/AppArmor) activated,
          mount fstype=rpc_pipefs,
        }
        
-1. Load this profile into AppArmor:
+1. Load this profile into the kernel with [`apparmor_parser`](http://manpages.ubuntu.com/manpages/xenial/man8/apparmor_parser.8.html):
 
        $ sudo apparmor_parser -r -W /path/to/file/from/previous/step
 
 1. Add `--security-opt apparmor=erichough-nfs` to your `docker run` command. e.g.
 
        docker run                                \
-         -v /path/to/exports.txt:/etc/exports:ro \
          -v /path/to/share:/nfs                  \
+         -v /path/to/exports.txt:/etc/exports:ro \
          --cap-add SYS_ADMIN                     \
          -p 2049:2049                            \
          --security-opt apparmor=erichough-nfs   \
          erichough/nfs-server
+         
+   or in `docker-compose.yml`:
+   
+   ```YAML
+   version: 3
+   services:
+     nfs:
+       image: erichough/nfs-server
+       volumes:
+         - /path/to/share:/nfs
+         - /path/to/exports.txt:/etc/exports:ro
+       cap_add:
+         - SYS_ADMIN
+       ports:
+         - 2049:2049
+       security_opt:
+         - apparmor=erichough-nfs
+   ```