28. create model class dosen,upload media file dan view pdf di browser 

membuat model class dosen, upload foto, uload file, view pdf di browser, setting media file.
jika terdapat error
"It is impossible to add a non-nullable field 'details1' to feature without specifying a default. This is because the database needs something to populate existing rows."
ketika melakukan makemigrations. silahkan menambahkan default="" pada field