Update README.md

[Jan-Walther-Basilicom]

Version constraint for composer create-project

If the version constraint is omitted, it may install 2025.4 version, e.g. if you have PHP 8.3 installed. And then the step

./vendor/bin/pimcore-install --install-profile='App\Installer\SkeletonProfile'

will fail with error

The "--install-profile" option does not exist.

With this PR, you will get

Cannot use pimcore/skeleton's latest version v2026.1.0 as it requires php ~8.4.0 || ~8.5.0 which is not satisfied by your platform.

Alternative approach:
We could add --install-profile as dummy option in 2025.4, then it will not error. But imho it is a good idea to specify the Pimcore Platform version to be installed.

--no-scripts for create-project

composer create-project also runs the scripts from post-install-cmd. This does not make sense as Pimcore is not installed yet and executing it on the host and not in Docker does make even less sense - in my case it caused error

PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 2621440 bytes) in /Users/janwalther/PhpstormProjects/skeleton/my-project/vendor/symfony/framework-bundle/DependencyInjection/
Compiler/ContainerBuilderDebugDumpPass.php on line 52
during cache:clear

Use Studio UI login url

http:localhost/admin does not exist anymore, we need to use http://localhost/pimcore-studio/login now.