This adds retrying for getting redbox content and ensures the `next.config.js` file is cleaned up for the dynamic-routing test suite.

x-ref: https://github.com/vercel/next.js/pull/20786#issuecomment-755929891

This single sentence addition would have saved me about a day of troubleshooting. This doc doesn't mention how the inline occurs. The only place I could eventually find that mentions this is the server & public runtime config pages.

![image](https://user-images.githubusercontent.com/6315466/103914132-57f17500-5144-11eb-9a21-ff27bea14f29.png)

## summary
- add return types
- move `locale` variable const from let
- ~use [strict equality](https://github.com/vercel/next.js/pull/20806/files#diff-2433946f9a058f1b070138d12c20f10a9128e46408033629181f9f7fc3b9b9b2R275)~

Fix all deploy button URLs in the Next.js repo to follow the following format:
```
https://vercel.com/new/git/external?repository-url=https://github.com/vercel/next.js/tree/canary/examples/<EXAMPLE_NAME>&project-name=<EXAMPLE_NAME>&repository-name=<EXAMPLE_NAME>
```

The detailed docs for the Deploy Button can be found here: https://vercel.com/docs/more/deploy-button.

Also updates legacy Vercel import flow URLs (starting with vercel.com/import or with vercel.com/new/project), to use the new vercel.com/new URLs.

---

For example, for the `hello-world` example:

The URL is https://vercel.com/new/git/external?repository-url=https://github.com/vercel/next.js/tree/canary/examples/hello-world&project-name=hello-world&repository-name=hello-world

And the deploy button looks like this:
[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/git/external?repository-url=https://github.com/vercel/next.js/tree/canary/examples/hello-world&project-name=hello-world&repository-name=hello-world)

---

For reference, I used the following regexes to search for the incorrect URLs

```
\(https://vercel.com/import/git\?s=https://github.com/vercel/next.js/tree/canary/examples/(.*)\)
\(https://vercel.com/import/git\?c=1&s=https://github.com/vercel/next.js/tree/canary/examples/([^&]*)(.*)\)
\(https://vercel.com/import/project\?template=https://github.com/vercel/next.js/tree/canary/examples/(.*)\)
https://vercel.com/import/git
https://vercel.com/import/select-scope
https://vercel.com/import
https://vercel.com/new/project
```

* feat: add Twilio Paste example

* Updated readme
Co-authored-by: NLuis Alvarez <luis@vercel.com>
Co-authored-by: Nkodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Rename https://next-blog-starter.now.sh to https://next-blog-starter.vercel.app (@lfades renamed the domain name)

Follow https://github.com/vercel/next.js/pull/20628

* Added with-mqtt-js example

* Fixed eslint/prettier errors

* Update README.md

* Updated with-mqtt-js to latest next/react versions, WIP: Refactoring useMqtt()

* A2PC

* Working example, unrefactored

* A2PC

* Ran prettier

* Used NEXT_PUBLIC_ prefix instead of keys as props

* Updated readme and added .env.local.example
Co-authored-by: NSebastian König <sebastian_koenig@cotyinc.com>
Co-authored-by: NLuis Alvarez D <luis@vercel.com>

Fixes #16864 

The `router` can be missing in a test environment when trying to render a `Link` component. This PR bails out of `router.prefetch()` when `router` is missing.

The alternative is for users to mock `next/link` or to mock the `router` and wrap their test components.

Please let me know any feedback.

Fixes #20403

This updates the error shown when a path doesn't match the dynamic route in `getStaticPaths` to not include the `locale` since this isn't considered when matching against the dynamic route. 

This ensures rewrites to API routes with i18n enabled handles as an API route correctly. This also adds tests for API routes in the i18n test suite

Fixes: https://github.com/vercel/next.js/issues/20725

Fix mini typo

Docs for https://github.com/vercel/next.js/pull/20216/.

This is a follow-up to https://github.com/vercel/next.js/pull/20596 and https://github.com/vercel/next.js/pull/20658 ensuring the `as` value is prefixed with the `basePath` correctly with a query. This updates the test to also ensure no errors are shown when a query is present on the index `basePath` route. 

Fixes: https://github.com/vercel/next.js/pull/20757#issuecomment-754338510

* Updated deploy button URL

* Update bottom button

You can initialize the Firebase app instance without checking for window, but it is required for using the analytics module.

This is a #19325 reconfigured to support a loader passed in via a `loader` prop on the Image component, rather than using a config-based approach.

The idea is that applications wanting to use a custom loader will create a wrapper element for the  image component that incorporates that loader. See a simple example of this pattern in the integration tests. 

This solution is similar to the one prototyped by @ricokahler in #20213 and described at https://github.com/vercel/next.js/issues/18606#issuecomment-720149156

---

Closes #19325
Fixes #18606

Co-authored-by: NKanta Kodama <kanta.kodama@linecorp.com>

## summary
- Explicitly define return types
- Add type of  [Observer](https://github.com/vercel/next.js/pull/20728/files#diff-5de64b97b2f26e4e41d197a8295e8750825c75b8ca557a4b947a4c3569345974R7)

Closes: https://github.com/vercel/next.js/issues/20197

`getLoginSession` takes only one argument

Adds the `pr` section from https://docs.microsoft.com/en-us/azure/devops/pipelines/repos/github?view=azure-devops&tabs=yaml#pr-triggers to filter paths that don't require test runs on PRs.