Example Express Server using Typescript which can be deployed via Heroku

##Difference from deploying normal nodejs app in Heroku

• Install typescript, typings via npm
• Init typings

typings init

This will create a typings.json that contains dependancies.

• Install required typings (node, express in this case)

Microsoft guide : https://code.visualstudio.com/docs/runtimes/nodejs#_typings

typings install node --ambient --save

OR use like this: typings install dt~node --save --global

typings install express serve-static express-serve-static-core --ambient --save

typings install mime --ambient --save

Dependencies will be added to typings.json and thus you can gitignore typings folder. Later you can use this command to install dependencies

typings install

• Init tsc

tsc --init

This will create a tsconfig.json that contains compilerOptions required for typescript compiler. Make required changes.

• Add a reference to the main typings file (something.d.ts) in index.ts
• Create Procfile which asks to install all typings dependencies, run tsc command (to create corresponding .js file wherever specified) and start node
• Add all js files (*.js), typings folder in gitignore (and node_modules as usual). tsc command in Procfile will generate those for us.

###Note App can also be deployed to Heroku without initializing typings, tsc (where both tsconfig.json, typings.json wont be there). Instead you have to push typings folder completely to Heroku GIT. And make necessary changes in Procfile, so that there is no need to install typings seperately and add tsc compilerOptions directly in Procfile itself

./node_modules/.bin/tsc --module commonjs --outDir build/ --noImplicitAny --sourceMap --target ES5 index.ts