Fixed tests and git actions (#30)

Reviewed-on: #30
Co-authored-by: Tom Tröger <t.troeger.02@gmail.com>
Co-committed-by: Tom Tröger <t.troeger.02@gmail.com>

Backend/models/db_test.go

@@ -36,10 +36,12 @@ func SetupDBFixture(t *testing.T) *DBFixture {
 		t.Fatalf("failed to connect to database: %v", err)
 	}
 
-	// err = MigrateDB(db, "file://../../migrations")
-	// if err != nil && err != migrate.ErrNoChange {
-	// 	t.Fatalf("Failed to migrate database: %v", err)
-	// }
+	defer db.Close()
+
+	err = MigrateDB(db, "file://../../migrations")
+	if err != nil && err != migrate.ErrNoChange {
+		t.Fatalf("Failed to migrate database: %v", err)
+	}
 
 	tx, err := db.Begin()
 	if err != nil {