* Update README.md with steps to setup Dev environment

Added steps to setup development environment on your local system

* Update README.md

Co-authored-by: Jeff Bruemmer <jeffbruemmer@gmail.com>

* Update README.md

Co-authored-by: Jeff Bruemmer <jeffbruemmer@gmail.com>

* Update README.md

Co-authored-by: Jeff Bruemmer <jeffbruemmer@gmail.com>

* Update README.md

Co-authored-by: Jeff Bruemmer <jeffbruemmer@gmail.com>

* Update README.md

Co-authored-by: Jeff Bruemmer <jeffbruemmer@gmail.com>

* Update README.md

Co-authored-by: Jeff Bruemmer <jeffbruemmer@gmail.com>

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Co-authored-by: Jeff Bruemmer <jeffbruemmer@gmail.com>

- Removed non-content words to make sentence more concise.
- Removed hedging between "your applications" and "or third party software" to increase confidence by reducing indirection; third-party applications is already mentioned in the details as well and redundant.
- Emphasized "Hit" verb by starting the sentence with it.
- Swapped "specialized" for "custom" to remove ambiguity and emphasize the user/developer's role in setting up the software.

* Fix links supported database docs in README.md

* update links

Co-authored-by: Jeff Bruemmer <jeffbruemmer@gmail.com>

* Update dashboard link in README

This PR updates the dashboard link in the README from `answers` to `dashboards`

* more www

Co-authored-by: Jeff Bruemmer <jeffbruemmer@gmail.com>

thanks @qnkhuat for pointing these out! 

* Update suggestion from AdoptOpenJDK to Eclipse Temurin

Eclipse Temurin is the replacement for AdoptOpenJDK Hotspot, as the project now is part from Eclipse Foundation, and the OpenJ9 build is called now as Semeru.

* Update java-versions.md

* Update running-the-metabase-jar-file.md

* consolidated official database lists

* update README to link to official list

* specify GA version

Create SECURITY.md

Point README.md to SECURITY.md to avoid duplicated information, and
removed the explicit version table in SECURITY.md to make it easier to
keep up to date.

We haven't been using this operationally for years. It's just taking up space and adding a button to the readme.

Co-authored-by: Maz Ameli <maz@metabase.com>

Co-authored-by: Console <jeffbruemmer@gmail.com>

* update info on languages

* grammar

* Add a new item in the feature list

Add a link for alerts  documentation

* tweak copy from review

Co-authored-by: Edu <eduavencama@gmail.com>