Add project description

Author: thespad

readme-vars.yml

@@ -2,6 +2,7 @@
 
 # project information
 project_name: socket-proxy
+project_description: The Socket Proxy is a security-enhanced proxy which allows you to apply access rules to the Docker socket, limiting the attack surface for containers such as watchtower or Traefik that need to use it.
 full_custom_readme: |
   {% raw -%}
   [![linuxserver.io](https://raw.githubusercontent.com/linuxserver/docker-templates/master/linuxserver.io/img/linuxserver_medium.png)](https://linuxserver.io)