Merge pull request #1237 from ashu8912/patch-1

Updated Contributing Installation Guide

Author: catarak

developer_docs/installation.md

@@ -6,7 +6,7 @@ Follow these instructions to set up your development environment, which you need
 
 _Note_: The installation steps assume you are using a Unix-like shell. If you are using Windows, you will need to use `copy` instead of `cp`.
 
-1. Install [node.js](http://nodejs.org/), which also automatically installs the [npm](https://www.npmjs.org) package manager.
+1. Install [node.js](https://nodejs.org/download/release/v10.15.0/) version 10.15.0 which also automatically installs the [npm](https://www.npmjs.org) package manager.
 2. [Fork](https://help.github.com/articles/fork-a-repo) the [p5.js Web Editor repository](https://github.com/processing/p5.js-web-editor) into your own GitHub account.
 3. [Clone](https://help.github.com/articles/cloning-a-repository/) your new fork of the repository from GitHub onto your local computer.
 
@@ -21,7 +21,7 @@ _Note_: The installation steps assume you are using a Unix-like shell. If you ar
    $ npm install
    ```
 5. Install MongoDB and make sure it is running
-   * For Mac OSX with [homebrew](http://brew.sh/): `brew install mongodb` then `brew services start mongodb`
+   * For Mac OSX with [homebrew](http://brew.sh/): `brew tap mongodb/brew` then `brew install mongodb-community` and finally start the server with `brew services start mongodb-community` or you can visit the installation guide here [Installation Guide For MacOS](https://docs.mongodb.com/manual/tutorial/install-mongodb-on-os-x/)
    * For Windows and Linux: [MongoDB Installation](https://docs.mongodb.com/manual/installation/)
 6. `$ cp .env.example .env`
 7. (Optional) Update `.env` with necessary keys to enable certain app behavoirs, i.e. add Github ID and Github Secret if you want to be able to log in with Github.