Much of our toolchain is provided by MediaWiki-Vagrant, please follow setup instructions at the main MediaWiki-Vagrant page
Once that has been set up you can install the fundraising role, there are instructions here: Fundraising_tech/vagrant.
If you decide to install the software onto a server without using vagrant, read Fundraising Tech/Donation Pipeline Setup.
Once you're set up, and have a patch merged, learn to deploy code.
Queue Testing: Fundraising tech/Queue testing