Welcome example (#1194)

* Add user greeting example

* Add welcome.js to index.yml

* Reword greeting message

* Update welcome.js

* Rename welcome.js to greeting.js

* Update index.yml

docs/examples/greeting.js

@@ -0,0 +1,33 @@
+/*
+  A bot that welcomes new guild members when they join
+*/
+
+// import the discord.js module
+const Discord = require('discord.js');
+
+// create an instance of a Discord Client
+const client = new Discord.Client();
+
+// the token of your bot - https://discordapp.com/developers/applications/me
+const token = 'your bot token here';
+
+// the ID of the channel in which the bot will greet new users
+const channelID = 'your channel ID here';
+
+// the ready event is vital, it means that your bot will only start reacting to information
+// from Discord _after_ ready is emitted.
+client.on('ready', () => {
+  console.log('I am ready!');
+});
+
+// create an event listener for new guild members
+client.on('guildMemberAdd', member => {
+  // get the channel by its ID
+  const channel = client.channels.get(channelID);
+
+  // send the message, mentioning the member
+  channel.sendMessage(`Welcome to the server, ${member}!`);
+});
+
+// log our bot in
+client.login(token);

docs/index.yml

@@ -16,5 +16,7 @@
       path: ping.js
     - name: Avatars
       path: avatars.js
+    - name: Server greeting
+      path: greeting.js
     - name: Webhook
       path: webhook.js