Install Docker
https://desktop.docker.com/win/main/amd64/Docker%20Desktop%20Installer.exe
Install rustup
https://static.rust-lang.org/rustup/dist/x86_64-pc-windows-msvc/rustup-init.exe
Rust optimizer setup
https://github.com/CosmWasm/rust-optimizer
Run in Terminal:
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
Open build.ps1 with Windows PowerShell ISE and run