Add hints for "install and set up mongoose" (#36474)

* Add hints for "install and set up mongoose"

* Add hint for how to solve the timeout error

* Add hint for what to put in the `.env` file

* Add code snippets for `.env`, `package.json` and `myApp.js`

* Restructure hints and headers

* Remove code solution from timeout hint

* Restructure headers to match the new hint template

* Move hint subject below the header

Co-Authored-By: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

* Move hint subject below the header

Co-Authored-By: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

* Update text in spoiler tag

Co-Authored-By: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

* Update text in spoiler tag

Co-Authored-By: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

* Update text in spoiler tag

Co-Authored-By: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

* Add javascript tag to code block

Co-Authored-By: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

* Move first line of code below ```

Co-Authored-By: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

* Remove placeholder text

Co-Authored-By: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

* Add json tag to code block

Co-Authored-By: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

* Remove redundant sentence

Co-Authored-By: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

* Format solutions section and hint

* Replace tabs with 2 space indents in `package.json`
* Remove the spoiler tags from each file name
* Remove placeholder comments in `myApp.js` to make it easier to read the code
* Update sentence in hint as two words were not displaying

guide/english/certifications/apis-and-microservices/mongodb-and-mongoose/install-and-set-up-mongoose/index.md

@@ -1,7 +1,7 @@
 ---
 title: Install and Set Up Mongoose
 ---
-## Install and Set Up Mongoose
+# Install and Set Up Mongoose
 
 You might want to check both the [MongoDB](https://www.npmjs.com/package/mongodb) and the [Mongoose](https://www.npmjs.com/package/mongoose) NPM Repositories for the manual configuration if you are not using Giltch.
 
@@ -12,6 +12,96 @@ OR
 2. Once done add the MONGO_URL in .env file and save your path as 
 ```` mongodb://<dbuser>:<dbpassword>@ds<PORT>.mlab.com:<PORT>/<DATABASE-NAME> ```` which you copy from mLab. Remember to remove the angle brackets ````<  >```` when you replace your username and password of your database.
 
+## Hints
+
+### Hint #1
+**Timeout error**
+
+If the tests are timing out, check the `package.json` file. Ensure the final dependency does not end in a `,`.
+
+For example, this will result in a timeout error:
+```
+"dependencies": {
+  "express": "^4.12.4",
+  "body-parser": "^1.15.2", 
+},
+```
+
+### Hint #2
+**add MONGO_URI to .env**
+* Insert a line that looks similar to: `MONGO_URI=mongodb+srv://<username>:<password>@<clustername>-vlas9.mongodb.net/test?retryWrites=true`. `<username>` and `<clustername>` will be automatically generated by MongoDB.
+
+* Replace `<password>` with your password. There should be no `<>` characters (unless those are in your password).
+
+Still having issues? Check the below hints:
+
+* Remove spaces before and after `=`. This is correct: `MONGO_URI=mongodb...`. This is incorrect: `MONGO_URI = mongodb...`
+
+* Do you have symbols or special characters in your password, e.g. `$&(@`? If so, you will need to translate these into unicode. MongoDB has instructions on how to do this. I would suggest changing your password to be lettes and numbers only for simplicity.
 
 
-<!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds  -->
+## Solutions
+
+<details><summary>Solution #1 (Click to Show/Hide)</summary>
+
+**.env**
+  
+```
+GLITCH_DEBUGGER=true
+# Environment Config
+
+# store your secrets and config variables in here
+# only invited collaborators will be able to see your .env values
+
+# reference these in your code with process.env.SECRET
+SECRET=
+MADE_WITH=
+MONGO_URI=mongodb+srv://<username>:<ENTERYOURPASSWORDHERE>@<clustername>-vlas9.mongodb.net/test?retryWrites=true
+# note: .env is a shell file so there can't be spaces around =
+```
+
+**package.json**
+  
+```json
+{
+  "name": "fcc-mongo-mongoose-challenges",
+  "version": "0.0.1",
+  "description": "A boilerplate project",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js"
+  },
+  "dependencies": {
+    "express": "^4.12.4",
+    "body-parser": "^1.15.2",
+    "mongodb": "^3.0.0",
+    "mongoose": "^5.6.5"
+  },
+  "engines": {
+    "node": "4.4.5"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://hyperdev.com/#!/project/welcome-project"
+  },
+  "keywords": [
+    "node",
+    "hyperdev",
+    "express"
+  ],
+  "license": "MIT"
+}
+```
+
+**myApp.js**
+  
+```javascript
+/** # MONGOOSE SETUP #
+/*  ================== */
+
+/** 1) Install & Set up mongoose */
+const mongoose = require('mongoose');
+mongoose.connect(process.env.MONGO_URI);
+```
+</details>
+