update message embed discord.js code example

Example: discord.js MessageEmbed

//top of file
const Discord = require('discord.js')

//example (inside of a command)

const embed = new Discord.Message.Embed()
embed.setAuthor(`example`)
embed.setTitle(`example`)
embed.setDescription(`example`)

message.channel.send({embed});

//there are obviously some other add-ons, such as AuthorIcon and URL.