* support different env configs.

* fomrat code

* Hide doc

* Slightly rework the PR

* Remove .env in default template
* Use just one entry in the paths
* Unify env.js and loadEnv.js

* Oops, forgot these folks

* Change proxy localhost to I27.0.0.1 for windows

* Update comment

* resolve localhost IP with DNS lookup on windows

* Fix CI errors

* Promisify addWebpackMiddleware

* Remove Node 6 syntax

* Update addWebpackMiddleware.js

* Actually use the resolved proxy

Pass the host from environment variable as argument of the devServer's
listen function instead of a field of options object.
Set the default host to 0.0.0.0 instead of localhost.

* Makes end-to-end testing crash on unhandled rejections

* Comment fix

* mv create-react-app/index.js -> create-react-app/creteReactApp.js

* update to modern code style

* var -> cosnt

* set trailing-coma to es5 for prettier

* Refactor start script into modules

* Move dev server config into config file

* Replace eject file whitelist with a "remove-file-on-eject" flag

* Move utils into scripts folder (for inclusion in ejection)

* Add missed changes

* Pass showInstructions as an argument

* Fix eject bug

* Don't eject babelTransform

* (feat): add webpack validation error logging

* Style nit

* Style tweak

* Style nit

Resolves #1508

* Upgrade webpack

* Address more webpack v2 ...

* Update html-webpack-plugin

* Remove LoaderOptionsPlugin from dev config

* ExtractTextPlugin still uses webpack 1 syntax
... and doesn't support complex options (yet)

* Grammar nit

* Update extract text webpack plugin

* - Remove webpack.LoaderOptionsPlugin
- Update deps

* Lerna hoists packages

* Update extract-text-webpack-plugin

* Update webpack-dev-server

* Remove imports for the tests

* stop removing babelrc

* Add `PUBLIC_URL` env variable for advanced use (#937)
* Add support for `PUBLIC_URL` env variable
* Remove unnecessary duplications
* Simplify served path choice logic
* Honor PUBLIC_URL in development
* Add e2e tests

Enables serving static assets from specified host.

Browser launch can still be suppressed using BROWSER=none

* Proxy rewrites Origin header to match the target server URL

* Added comments on rewriting Origin header by the proxy middleware

Added `ws: true` to the httpProxyMiddleware options, and also listen
for the "upgrade" event so that websockets can be proxied immediately,
rather than waiting for an initial HTTP request.

* add logging of existing port process on start

* Move port process wording in start command on to next line

* Color the named processes as cyan in terminal output

* Add handling for multiple processes on a part

- With the currently process filtering, if multiple processes are returned as running on port 3000, this command would fail. This splits apart the process IDing and the process naming, to support multiple processes.
- One curious thing about the bash command to get processes, is that it'll include browsers with a window open on localhost:3000. May want to reconsider that.

* Add process directory to existing port warning

- also moved terminal coloring up, when getting the process, to be able to distinguish the process command from the directory

* Change output color to all cyan, except "in"

* Rename getProcessNameOnPort -> getProcessForPort

- better reflects its broadened scope (both command and directory)

*...

In the `create-react-app` command, try to install packages using Yarn.
If Yarn is not installed, use npm instead.

In `react-scripts`, detect if the project is using Yarn by checking if
a `yarn.lock` file exists. If the project is using Yarn, display all
the instructions with Yarn commands and use Yarn to install packages
in `init` and `eject` scripts.

issue here #762

* Add syntax error overlay in development

* Support HMR being disabled

* Tweak CSS

* Extract some utilities into a separate package

* Add utils dir to `files` in package.json

* Do not create an empty `utils` dir on eject

* Add host as adjustable parameter through env variables

eg: `HOST=test.dev.local npm start`

* Style nit

* Load environment file via dotenv if .env file is present

* Document loading environment variables in .env file

* Minor doc tweaks

* openBrowser() causes docker-compose set ups to fail because of spawn EACCESS - closes #710



Signed-off-by: Aeneas Rekkas (arekkas) <aeneas@ory.am>

* Ignore errors

* Change http-proxy-middleware logLevel from silent to error

* provide onError handler for httpProxyMiddleware

* Send proper error reponse upon proxy error.