There is a user manual document.
https://github.com/vitotai/BrewManiacEsp8266/blob/master/docs/BrewManiacExManual_0.3.pdf
If you have installed VSCode+PlatformIO successfully. Just download the source from GitHub. Open the directory that contains "platformio.ini", then you can build and upload
More info:
http://docs.platformio.org/en/latest/ide/vscode.html
The web files can be downloaded OTA. You will be guided to download them when you connect to it. (Check chapter 5 in user manual.)
Ok, as soon as I get back home I´ll try it. Thank you very much, and I´ll come back for sharing the results!