The shipped PCB did not come with a reset button. To put the PCB in bootloader mode: locate the 2 `RESET` pins in the back of the PCB and short them with a conductive wire or tweezer.
See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).