* Simplify README

* Fix review comments

* Rename Developer guide

* Update README.md

Capitalized the G and S in "Getting Started," and moved "guide" to match the section title in the docs.

* Fixed sentence structure. Changed "download" to "grafana.com/get" and changed "get" to "download".

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

*  Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

Added punctuation and made minor grammar and format edits. 
Mostly added periods and colons.

For a long time we haven't been using codecov, remove it so it wouldn't confuse
the readers

Same idea as with the `gosec`, `revive` and etc.
Allows you to execute `make bra` as pinned local dependency instead
as global one. And therefore alleviates dependency installation issues.

README also updated - I was thinking to provide verbose installation instructions
for it. Since with that way we assume make is installed on the
developer system.

But it might be premature right now?

* Chore: Adds neccessary packages

* Wip: Initial dummy test in place

* Feature: Downloads Chromium if needed

* Fix: Adds global config object

* Refactor: Adds basic e2eScenario

* Build: Adds end to end tests to config

* Build: Changes end to end job

* Build: Adds browsers to image

* Build: Adds failing test

* Refactor: Adds first e2e-test scenario

* Fix: Ignores test output in gitignore

* Refactor: Adds compare screenshots ability

* Refactor: Removes unnecessary code

* Build: Removes jest-puppeteer

* Fix: Replaces test snapshots

* Refactor: Creates output dir if missing

* Refactor: Changes aria-labels to be more consistent

* Docs: Adds section about end to end tests

* Fix: Fixes snapshots

* Docs: Adds information about ENV variables

* Update readmes

* Fix devenv dasboard query

* Update devenv readme

* Add link to devenv from docs

Follow-up for 7316bdc9

Especially for new developers to the go and yarn ecosystems this readme part is quite confusing.

add notice to MacOS Docker user, if docker  memory limit is less than 2GiB, build process may fail when run ./node_modules/.bin/grunt build

[skip ci]

Link to the grafana license file from the docs.

* adds `npm start` / `yarn start` script
* starts a webpack-dev-server using the dev config, served on :3333
* hot reloading (HMR) for react/styles, not working for angular code
* new entry `dev.ts` for dynamic imports of CSS theme (ExtractText does
not work with HMR)
* TS loader pipeline moved out of common to add HMR for react
* applied `hot()` to some react containers (that's their new default
 export, named exports remains for testing)
* added sections to README
* updated yarn.lock

Removes alpha 

closes https://github.com/grafana/grafana/issues/11251

In "Install from source" section supposed that Grafana`s sources installed to `~/go` , but it is not always true. 
In other hand, `go get ..` command would install project to `$GOPATH`

https://golang.org/cmd/go/#hdr-Download_and_install_packages_and_dependencies

[skip ci]

[skip ci]

Simplified build instructions i

* tech: investigating karma + jest mix

* tech: migrating tests to jest

* tech: moved anoter test file to jest

* test: migrated two more test files to jest

* test: updated readme and made test fail to verify that it causes CI build failure

* tech: added code coverage for jest tests

* tech: testing codecov coverage

* tech: migrated more tests

* tech: migrated template srv to typescript and the tests to jest

* tech: minor build fix

* tech: build fixes

* build: another attempt at fixing go test with coverage