Added a new example script

- The new example script publishes messages every second once a
connection is established

examples/publish_server.js

@@ -0,0 +1,57 @@
+const Peer = require('../index.js').Peer;
+
+// MAIN -------------------------------------------------------------------------------------------
+
+// Claim this ID on the peerJS signalling server so that clients can connect to it directly
+// without having to coordinate this key with each other through other means
+const peer = new Peer('abcdefghijklmnopqrstuvwxyz', {debug: 2});
+
+let publishInterval = null;
+let count = 0;
+
+peer.on('open', (localId) => {
+    console.log(localId);
+})
+
+peer.on('connection', (conn) => {
+    console.log('Got a connection');
+
+    conn.on('open', () => {
+        conn.on('data', (data) => {
+            console.log(data);
+        });
+
+        conn.send('Hello, I am the echo server');
+
+        publishInterval = setInterval(() => {
+            count += 1;
+            conn.send('publish ' + count)
+            console.log('Sent ' + count)
+        }, 1000)
+    })
+
+    conn.on('disconnected', () => {
+        console.log('PEER DISCONNECTED');
+
+        clearInterval(publishInterval);
+        publishInterval = null;
+        count = 0;
+    });
+
+    conn.on('error', (err) => {
+        console.log('PEER ERROR');
+        console.log(err);
+
+        clearInterval(publishInterval);
+        publishInterval = null;
+        count = 0;
+    });
+
+    conn.on('close', () => {
+        console.log('PEER CLOSED');
+
+        clearInterval(publishInterval);
+        publishInterval = null;
+        count = 0;
+    });
+});