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Is OPENRESEARCH open source?
YES, the software is open source and the data as well.
Software
LAMP
A LAMP stack: Linux, Apache, mySQL, PHP is needed as a basis. See https://www.mediawiki.org/wiki/Manual:Running_MediaWiki_on_Debian_or_Ubuntu#Install_LAMP_Stack
Linux
e.g. Ubuntu 20.04 / Debian or similar Operating System. Could also be a virtual machine or a docker environment.
Apache
apt-get install apache2