fix dbname length

src/frontend/app/installer/database/database.component.html

@@ -25,7 +25,7 @@
         </mat-form-field>
         <mat-form-field appearance="outline">
             <mat-label>{{lang.dbName}}</mat-label>
-            <input matInput formControlName="dbNameCtrl" required>
+            <input matInput formControlName="dbNameCtrl" maxlength="50" required>
         </mat-form-field>
         <div class="alert-message alert-message-info" *ngIf="dbExist" role="alert" style="margin-top: 0px;min-width: 100%;">
             {{lang.stepEmptyDb}}