* updates relayer, uses web-vital lib, removes fid polyfill and removes unstable prefix from relayer

* simplify logic, fix null check

* update docs

* Update tests

* Rename relayWebVitals to reportWebVitals
Co-authored-by: Nhousseindjirdeh <houssein@google.com>

* Upgrade webpack

* rebundle

* Add Fast Refresh Support

* Add Basic Acceptance Test

* Increase delay

* fix version

* Ignore test files

* Update packages/next/build/webpack/loaders/next-babel-loader.js

* Copy tests

* Redo test style

* drop directory

* fix compile

* fix remove function

* Update helpers

* Enable "paths" support by default

* Enable NEXT_PUBLIC_ prefix exposing the variable globally

Part of #11106

* Disable PnP plugin in webpack 5
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Use full hashes for hot update names
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Disable autodll in webpack 5
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Disable HashedModuleIdsPlugin in webpack 5
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Use regexes for ignoreplugin as it only supports regexes in webpack 5
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* webpack 4 supports resourceRegExp and contextRegExp
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Remove webpack 4 specific properties from the webpack 5 config
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Add library option for webpack 5 support
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Fix TypeScript Errors
Co-authored-by: NZack Jackson <zackary.l.jackson@gmail.com>
Co-authored-by: NJoe Haddad <joe.haddad@zeit.co>

* Upgrade `terser-webpack-plugin` for Webpack 5

* Upgrade again

* cacache cannot be bundled

* cacache cannot be bundled

* fix file

* remove cacache dep

* Update LICENSE

* Add initial process.env stubbing for new env support

* Fix server process.env being stubbed in production

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

* Clean up env tests a bit

* Fix NEXT_PUBLIC env values not being inlined
Co-authored-by: NJoe Haddad <joe.haddad@zeit.co>

* Add basePath in link component and add/remove it consistently

* Update to not use regex for delBasePath

* Expose addBasePath as router method

* Revert "Expose addBasePath as router method"

This reverts commit 40fed596195c6affabf837e42d472452768e13a3.

* Expose basePath as router field

* Apply suggestion

* Expose basePath as router field

* remove un-used vars

* Update externals

* Apply lint fix

* Update size-limit test

* Update prefetch

* measures fid

* updates typings, fixes logic, updates per review comments

* update to es5

* separate clearMeasures

* use relayer

* creates fid polyfll render helper + simplifies measure

* switch to dynamic import

* creates fid experimental flag

* removes unecessary time-to-first-input metric

* removes hydration measure removes

* default flag to false
Co-authored-by: NJoe Haddad <joe.haddad@zeit.co>

* Externalize  from Server Builds

* Windows Compatibility for Plugins

* Only check for windows path on windows

* add comments

* Make sure to handle "next" import gracefully

* Update test file

* Remove req.env

* Rename NEXT_APP_ to NEXT_PUBLIC_

* Remove key exposing env config

* Update tests

* Update NEXT_APP_ test to NEXT_PUBLIC_

Fixes #11390

Fixes #11390

* Add initial support for new env config file

* Fix serverless processEnv call when no env is provided

* Add missing await for test method

* Update env config to .env.json and add dotenv loading

* ncc dotenv package

* Update type

* Update with new discussed behavior removing .env.json

* Update hot-reloader createEntrypoints

* Make sure .env is loaded before next.config.js

* Add tests for all separate .env files

* Remove comments

* Add override tests

* Add test for overriding env vars based on local environment

* Add support for .env.test

* Apply suggestions from code review
Co-Authored-By: NJoe Haddad <joe.haddad@zeit.co>

* Use chalk for env loaded message

* Remove constant as it’s not needed

* Update test

* Update errsh, taskr, and CNA template ignores

* Make sure to only consider undefined missing

* Remove old .env ignore

* Update to not populate process.env with loaded env

* Add experimental flag and add loading of global env values
Co-authored-by: NTim Neutkens <timneutkens@me.com>
Co-authored-by: NJoe Haddad <joe.haddad@zeit.co>

* Add support for tsconfig/json `paths` option

* Add tests for paths in tsconfig.json

* Don't apply aliases when paths is empty

* Clean up unused methods and link to TypeScript license

* Add tests for jsconfig

* Put feature under an experimental flag

* Enable to see if tests pass

* Update types

* Add feature under an experimental flag

* Add support for baseUrl option in tsconfig and jsconfig

* Move jsconfigPath

* Remove filter

* Add support for SCSS includePaths

* Support sassOptions instead of just includePaths
Co-authored-by: NTim Neutkens <timneutkens@me.com>
Co-authored-by: NJoe Haddad <joe.haddad@zeit.co>

* adding tests  for rect sync conformance check

* adding test for react sync script conformance check

* reverting yarn lock changes

* adding duplicate polyfill conformance

* bug fixes in dulpicate polyfill conformance check

* adding settings capability to conformance plugin

* removing minification check from server build

* bug fix

* settings for react sync script check