Dotenv and env example implemented (Closes #6).

Author: Zen0x7

.env.example

@@ -0,0 +1,6 @@
+APP_ENV=local
+APP_TOKEN=TEST
+
+SERVER_PORT=25053
+SERVER_IP=127.0.0.1
+DEFAULT_PONG_INTERVAL=3000

.gitignore

@@ -1 +1,2 @@
 /node_modules
+.env

app.js

@@ -1,7 +1,9 @@
-const net = require("net");
+require('dotenv').config();
+
+const net = require('net');
 const client = new net.Socket();
 
-client.connect(25053, "127.0.0.1", () => {
+client.connect(process.env.SERVER_PORT, process.env.SERVER_IP, () => {
     console.log("Connected");
     client.write("First Ping ... \n");
 });
@@ -13,7 +15,7 @@ client.on("data", (data) => {
        let sent = "Pong ... \n";
        client.write(sent);
        console.log("Send: " + sent);
-   }, 3000);
+   }, process.env.DEFAULT_PONG_INTERVAL);
 });
 
 client.on("close", () => {