Database schema restores by Sql job
SQL Server contains no facility to only backup the schema of a database.  Backup-and-restore can only be used to restore the entire contents of a database or, in the case of piecemeal restore, individual filegroups of a database, assuming there are multiple filegroups.

However, there are multiple tools available that can be used to export and synchronize schemas between versions of databases.

Just a couple of options, listed alphabetically:

ApexSQL SQL Diff
dbForge Schema Compare
Idera SQL Comparison Toolset
SQL Server Data Tools - MSBuild Support for schema comparison