Silent switches
/QUIET /IACCEPTSQLSERVERLICENSETERMS /SUPPRESSPRIVACYSTATEMENTNOTICE="True" /Action="Install" /UpdateEnabled=0 /FEATURES=SQL /INSTANCENAME="MSSQLSERVER" /SQLSYSADMINACCOUNTS=BUILTIN\ADMINISTRATORS
We advise you to review these parameters and customize them to your needs.
Further reading
Planning a SQL Server Installation (Microsoft documentation)
Install SQL Server on Windows from the command prompt (Microsoft documentation)