install from script
git clone https://github.com/rulanugrh/ersa.git
cd ersa
sudo ./install.sh
self build
git clone https://github.com/rulanugrh/ersa.git
cd ersa
go build -o ersa
install (windows user)
you can copy file `build/ersa.exe` if you are arch x64 bit
ersa [DOMAIN_NAME]