install new template on captiveflask:
 
 Usage: install plugin_name file_complete_path.zip
 param plugin_name: the plugin_name name is the same [plugin_name].py
 file_complete_path.zip: complete file path with .zip 

 Description:
    Install a custom captiveflask templates from command line
    require restart the wifipumpkin3 for load all plugins


Referencies:
   https://wifipumpkin3.github.io/docs/getting-started#creating-captive-portal-template