There is pre-build firmware named firmware.bin, please flash it to Spider board flash address 0x08008000. You can follow Spider firmware upload instruction here (github gitee).
And the menuconfig of this pre-build firmware is below.
We provide you two OS images choices: Mainsail OS and Octopi OS.
You can get the corresponding Mainsail OS here (1.Dropbox).
If your kit version is rev1.0 or rev1.1, your Spider board version is 1.x, you can get the responding Octopi system here(1.Dropbox 2.百度云盘 提取码：1357) . If your kit version is rev1.2, then your Spider board version is 2.2, and you can get the responding Octopi system here(1.Dropbox 2.百度云盘 提取码：YYDS).
You can login in Octoprint with the following account and password.
Account: FYSETC
Password: 12345678
Before flash, you need an SD card , minimum requirement of SD card capacity is 8G. Please prepare that first. And then you can use this software here to install. Well that are so many OS flash tool that you can use. And there are a lot of tutorial if you google how to flash os image.
OS SSH account and password
Account: pi
Password: raspberry