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📚 clarify architecture docs 🏙
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@mars
mars authored Sep 4, 2017
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Expand Up @@ -423,20 +423,24 @@ heroku buildpacks:set https://github.com/mars/create-react-app-buildpack.git#v1.
Architecture 🏙
------------

This buildpack composes several buildpacks (specified in [`.buildpacks`](.buildpacks)) to support **no-configuration deployment** on Heroku:
This buildpack combines several buildpacks, specified in [`.buildpacks`](.buildpacks), to support **zero-configuration deployment** on Heroku:

1. [`heroku/nodejs` buildpack](https://github.com/heroku/heroku-buildpack-nodejs)
* complete Node.js enviroment to support the webpack build
* `node_modules` cached between deployments
* installs complete `node`, puts it on the `$PATH`
* version specified in [`package.json`, `engines.node`](https://devcenter.heroku.com/articles/nodejs-support#specifying-a-node-js-version)
* `node_modules/` cached between deployments
2. [`mars/create-react-app-inner-buildpack`](https://github.com/mars/create-react-app-inner-buildpack)
* enables [runtime environment variables](#user-content-runtime-configuration)
* production build for create-react-app, `npm run build`
* generates the [default `static.json`](#user-content-customization)
* performs the production build for create-react-app, `npm run build`
* enables [runtime environment variables](#user-content-runtime-configuration)
3. [`heroku/static` buildpack](https://github.com/heroku/heroku-buildpack-static)
* [Nginx](http://nginx.org/en/) web server
* handy static website & SPA (single-page app) [customization options](https://github.com/heroku/heroku-buildpack-static#configuration)
* launches via `bin/boot`
* configure via `static.json`; see [options specific to this buildpack](#user-conter-web-server) and [all options](https://github.com/heroku/heroku-buildpack-static#configuration)

Runtime processes are launched based on the last buildpack's default processes, the static buildpack's Nginx web server. Processes may be customized with a [Procfile](#user-content-procfile).


Runtime processes are launched based on the last buildpack's [Procfile](#user-content-procfile).

### General-purpose SPA deployment

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