# npm install --save-dev ts-node typescript nodemon @types/express
# npm i express
# npm install -g typescript
# tsc --init
# "rootDir": "./src", where we will placed ts file uncomment it
# "outDir": "./dist",
# "experimentalDecorators": true, /* Enable experimental support for legacy experimental decorators. */
# "emitDecoratorMetadata": true,
# create a source folder and start writing ts file there
# "build":"tsc -p ." the -p flag will take from source and search in the current directly
# "scripts": {
# "start": "nodemon ./src/app.ts",
# "build":"tsc -p .",
# "start:prod":"node ./dist/app.ts"
# },
# added dev
# "scripts": {
# "start:dev": "nodemon ./src/app.ts",
# "build":"tsc -p .",
# "start:prod":"node ./dist/app.ts"
# },
# npm run start:dev
# to build for production npm run build
# npm run build
# it will create a app.js file javascript file
# npm install typeorm reflect-metadata pg for dependency