NodeJS Development Setting

1. NVM(Node Version Manager) trouble shooting

   1. nvm not found

      1. run source ~/.nvm/nvm.sh on ~/ location

2. NPM(Node Package Manager)

   1. npm --save [package name] : install package and write dependencies on "package.json"

   2. npm --save-dev [package name] : install packages for development environment packages.

   3. npm packages

      1. express : express.js framework

      2. mongoose : abstract mongodb and provide mongodb api

      3. body-parser : parse incoming request body. parsing middleware.

      4. nodemon : restart automatically nodejs server when save the js files.

      5. eslint : linter for ecama script

      6. babel-cli / babel-core / babel-eslint / babel-preset-es2015 / babel-preset-statge-0
         -> It is important that whether web browser supports ES2015 or not, thus product is needed to transform to javascript. Babel is "transpiler" which transforms ES2015 file to javascript.
         -> need to create .barbelrc file
         -> babel core will transform src directory files to dist directory

      7. {
           "presets":[
             "es2015",
             "stage-0"
           ]
         }
         

      8. package.json sample file

      9. "name": "sample-app",
           "version": "0.0.1",
           "description": "descriptions..",
           "main": "dist",
           "scripts": {
             "dev": "NODE_ENV=development nodemon -w src --exec \"babel-node src --presets es2015,stage-0\"",
             "build": "babel src -s -D -d dist --presets es2015,stage-0",
             "prestart":"npm run -s build",
             "start":"NODE_EV=production pm2 start dist",
             "lint":"eslint src",
             "test": "echo \"Error: no test specified\" && exit 1"
           },
           "eslintConfig": {
             "parserOptions": {
               "ecmaVersion": 7,
               "sourceType": "module"
             },
             "env": {
               "node": true
             },
             "rules": {
               "no-console": 0,
               "no-unused-vars": 1
             }
           },
           "author": "author",
           "license": "ISC",
           "dependencies": {
             "body-parser": "^1.17.1",
             "express": "^4.15.2",
             "mongoose": "^4.9.1"
           },
           "devDependencies": {
             "babel-cli": "^6.24.0",
             "babel-core": "^6.24.0",
             "babel-eslint": "^7.2.0",
             "babel-preset-es2015": "^6.24.0",
             "babel-preset-stage-0": "^6.22.0",
             "eslint": "^3.18.0",
             "nodemon": "^1.11.0"
           }
         }