[FEATURE] Add a development part to documentation

Documentation/Developer/Index.md

@@ -0,0 +1,67 @@
+![LUX](/Documentation/Images/logo_claim.svg#gh-light-mode-only "LUX")
+![LUX](/Documentation/Images/logo_claim_white.svg#gh-dark-mode-only "LUX")
+
+## How to develop with LUX
+
+### LUX
+
+#### Local test environment
+
+LUX ships its own testing environment based on docker. This can simply be started in the same folder as LUX with
+`make install-project` for the first time and then
+`make stop` to stop the container and
+`make start` to start it again
+
+After that Backend is reachable under https://local.lux.de/typo3/
+
+Login is possible with `akellner` as username and password.
+
+*Note* Doing a `make` on CLI lists a bunch of useful commands (like clear caches, etc...)
+*Note* Docker and Dinghy should be installed on your unix system first
+
+#### Run tests
+
+There are different tests that can be started locally. First of all, you have to login into the PHP-container with
+`make login-php`
+
+After that, you can run different tests:
+
+| Test                    | Command                  |
+|-------------------------|--------------------------|
+| Start code sniffer test | `composer test:php:cs`   |
+| Start PHP linter        | `composer test:php:lint` |
+| Start TypoScript linter | `composer test:ts:lint`  |
+| Start unit tests        | `composer test:unit`     |
+
+### LUXenterprise
+
+If you clone LUXenterprise, you have basically the same possibilities as in LUX, but LUXenterprise will also install LUX
+of course.
+
+#### Local test environment
+
+LUX ships its own testing environment based on docker. This can simply be started in the same folder as LUX with
+`make install-project` for the first time and then
+`make stop` to stop the container and
+`make start` to start it again
+
+After that Backend is reachable under https://local.luxenterprise.de/typo3/
+
+Login is possible with `akellner` as username and password.
+
+*Note* Doing a `make` on CLI lists a bunch of useful commands (like clear caches, etc...)
+*Note* Docker and Dinghy should be installed on your unix system first
+
+#### Run tests
+
+There are different tests that can be started locally. First of all, you have to login into the PHP-container with
+`make login-php`
+
+After that, you can run different tests:
+
+| Test                    | Command                  |
+|-------------------------|--------------------------|
+| Start code sniffer test | `composer test:php:cs`   |
+| Start PHP linter        | `composer test:php:lint` |
+| Start TypoScript linter | `composer test:ts:lint`  |
+| Start unit tests        | `composer test:unit`     |

Documentation/Index.md

@@ -12,3 +12,6 @@ We want to give you hints from time to time to get best results with your market
 
 ## [Technical documentation](Technical/Index.md)
 A fully technical documentation how to install, configure and extend lux to your needs.
+
+## [Developer documentation](Developer/Index.md)
+How to develop with LUX and LUXenterprise