Restore ALL databases with sqlcmd in SQL Server (Express, Docker, 2017)
Based on what you want I would do the following:


Create two files - List.txt (with the list of DBs you want to
restore) and DBRestore.bat with sqlcmd command to run a stored
procedure 'DBRestore' inside SQL Server
Create a stored procedure 'DBRestore' which loads into SQL Server temp table the list from the LIST.txt and processes it - reads DB name one by one and restores them