Help:
dockerbuild --Help

Init config:
dockerbuild ::init

Build release use config or default rust:
dockerbuild build --release --target-dir linux_target

dockerbuild :image:i386/rust:1.47 build --release --target-dir linux_i386_target

dockerbuild :image:i386/rust:1.47 :mirror:git:*** build --release --target-dir linux_i386_target