Add EspoCRM version to install script options

[AlexxxH]

I'm building a custom EspoCRM extension, which I have tested for compatibility against particular EspoCRM versions. I'd like to be able to specify an EspoCRM version when installing EspoCRM by script, to ensure that my extension will function properly.

Currently the install script runs docker compose which pulls the espocrm image from the Docker hub, e.g. espocrm/espocrm:fpm, which is the latest version. There are images for previous EspoCRM versions on the Docker hub, e.g. espocrm/espocrm:7.5.6-fpm.

Could you add a version option to the EspoCRM install options, to allow an EspoCRM version to be specified? This could then be used in the docker compose files to pull the EspoCRM image with that version.