The very first thing I do is update documentation. You're a fresh set of eyes and so documentation for onboarding, setup, and building the application on your

The very first thing I do is update documentation. You're a fresh set of eyes and so documentation for onboarding, setup, and building the application on your laptop is the kind of thing that often goes by the waist side. Did a step not work because you've updated your OS? Was there a critical typo in the terminal? These things provide immediate value to all future hires.