herokuCheatsheet

• Heroku will npm install the requirements from the package.json

1. Install heroku

   • Mac
     • brew install heroku/brew/heroku

2. Login to heroku

   • heroku login
     • key in registered email and password if prompted
     • or follow instructions

3. Make sure start script is included in package.json file

   • "start": "node app.js"

   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
     "start": "node app.js"
   }

   • if the start script is not included, heroku will not run, and return an application error

4. if using Node js

   • make sure app.listen is properly configured
     • app.listen(process.env.PORT, process.env.IP);

5. make sure git is used

   • git init
   • git add .
   • git commit -m "initial commit"

6. create heroku, add project name for custom url (https://projectName.herokuapp.com)

   • heroku create projectName

7. push to heroku server

   • git push heroku master

• read error report

  • heroku logs

• view all folders and files

  • heroku run ls

• view files inside a folder

  • heroku run ls folderName

• if using mongodb, need to create new cluster at mongodb atlas

  • then change app.js settings
    • old: mongoose.connect("mongodb://localhost:27017/yelp_camp", {useNewUrlParser: true});
    • new: copy link given when connected to new cluster
      • change <password> to registered password
      • mongoose.connect("mongodb+srv://reshinto:<password>@cluster0-lyejj.mongodb.net/test?retryWrites=true", {useNewUrlParser: true});

• Set environment variables in the Heroku dashboard

  • go to apps and select the app to modify
    • click settings
      • at "Config Vars", click "Reveal Config Vars"
        • input the KeyVariable
          • variable used to call database url
        • input the Value
          • database url

• another way to set environment variable at Heroku through terminal

  • heroku config:set myKey=myValue

• View all configs

  • heroku config

• Get environment variable value

  • heroku config:get myKey

• Run Bash in heroku

  • heroku run bash