fn create function

$ fn create function

MANAGEMENT COMMAND
  fn create function - Create a function within an application
    
USAGE
  fn [global options] create function [command options] <app-name> <function-name> <image> 
    
DESCRIPTION
  This command creates a new function within an application.
    
COMMAND OPTIONS
  --memory value, -m value  Memory in MiB (default: 0)
  --config value, -c value  Function configuration
  --timeout value           Function timeout (eg. 30) (default: 0)
  --idle-timeout value      Function idle timeout (eg. 30) (default: 0)
  --annotation value        Function annotation (can be specified multiple times)
  --image value             Function image
  

Some link