This updates old examples to the more universal `npx` command.

Fixes https://github.com/vercel/next.js/discussions/12103

Co-authored-by: NJoe Haddad <joe.haddad@zeit.co>

The method initializeStore is only being used locally by useStore.
By having this exported I initially thought the consumer would have to call this as setup globally and then call useStore as well for each consuming component.

Downloading the sample I saw it's only useStore that is being used by the consuming app and this could be made clear by not exporting initializeStore.

* Find/replace

* Update more URLs

* More rename

* Fix remaining examples

* More updates

* Update create-next-app

* Update remaining text

* Update
Co-authored-by: NShu Uesugi <shu@chibicode.com>

* fix: with-mobx

* refactor: up link

* refactor: npm run prettier-fix

* refactor: server side render

* Updated store implementation and pages

* Updated readme
Co-authored-by: Nwangcheng <wangcheng@deepblueai.com>
Co-authored-by: NLuis Alvarez <luis@zeit.co>

* Updated with-custom-reverse-proxy

* Updated readme of with-env-from-next-config-js

* Updated the kea example

* Updated with-mobx

* Updated with-mobx readme

* Updated the with-mobx-react-lite example

* Replace zeit.co/new → zeit.co/import

* Update deployment.md

* Find/Replace "Deploy it to the cloud..."

* Find/Replace "Deploy it to the cloud..." (no colon)

* Find/Replace "Deploy it to the cloud..." for firebase

* Convert remaining ones

* Storybook deployment

* Update with-stripe-typescript

* Update contributing.md

* Remove `now`

* Update examples/with-stripe-typescript/README.md
Co-Authored-By: NLuis Alvarez D. <luis@zeit.co>

* npx create → npm init

* Fix inconsistent instructions

* Update amp-first

* Update with-graphql-react

* with-firebase-cloud-messaging

* Update with-higher-order-component

* change create-next-app url

* Update create-next-app instruction

* Update instructions to use npm instead of npx

* Move "the idea behind the example" to top

* Rename

* Rename

* Update contributing.md with a README template

* Update `packages/`

* Update examples

* Update tests

* Update bench

* Update top level files

* Fix build

* trigger

* Remove Container from examples

* Update readme to reflect Container removal

* Remove Deploy To Now buttons

* Remove remaining buttons

* form handler example: Update deps and fix build from dep update

* Ran lint error fixers

* Fixes errors that occur when commit occurs

* Commit linter fixes

I wrote a [script](https://github.com/j0lv3r4/dependency-version-updater) to update dependencies recursively in `package.json` files, e.g.:

```
$ node index.js --path="./examples" --dependencies="react=^16.7.0,react-dom=^16.7.0"
```

This PR contains the result against the examples folder.

Babel related content in README.md is updated according to the updated .babelrc

* Add prettier for examples directory

* Fix files

* Fix linting

* Add prettier script in case it has to be ran again

On the server `props.initialMobxState` received by the `constructor` is a fully functioning mobx store that was instantiated by `getInitialProps()` only a few ticks earlier.
Thus, creating a new instance is unneccessary.

In the browser, however, `props.initialMobxState` is a hydrated plain object and thus the store needs to be initialized.

I spent far too much time fiddling with this example project before realizing it contained a bug in the store initialization logic and it was a bit more complex than it needed to be.

* The custom server was not needed
* The store-initialization did effectively the same thing twice for no reason
* And wrapping MyApp component in a HOC was wholly unnecessary indirection

My changes are split into four discrete commits for clarity.

Update to new @babel/plugin-proposal-decorators, @babel/plugin-proposal-class-properties plugins version.

Preferably this installation wouldn't be necessary, but in lieu of a fix...

#4751

in flavor of https://github.com/zeit/next.js/pull/4377

fixes #4390

* Installing only `babel-plugin-transform-decorators-legacy` didn't work
* It also needs to install `babel-plugin-transform-class-properties`

* Examples: clarify language around Yarn create & npx

* add missing READMEs and create-next-app usage

* suggest people tag jthegedus in firebase related issues

* add yarn alt instructions

* cerebraljs example readme & fixes

* remove global npm install of create-next-app

* add npx to create-next-app command in examples

* add bash to shell snippets

* add yarn create to next-app command in examples

* fix READMEs named with lowercase

* change READMEs to use UPPERCASE

* examples: add create-next-app

* fix with-typescript readme