Web: update page title, note about local only

Author: bbbbbr

index.html

@@ -5,7 +5,7 @@
     <title>Game Boy romusage</title>
 
     <meta http-equiv="content-Type" content="text/html; charset=UTF-8"/>
-    <meta name="description" content="Game Boy romusage"/>
+    <meta name="description" content="Romusage Web (Game Boy)"/>
     <meta name="keywords" content="romusage game boy gameboy gbdk zgb gbstudio .gb .gbc"/>
 
     <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"/>
@@ -39,7 +39,7 @@
                  ondragleave="dragLeaveHandler.call(this, event)">
                 <div class="usage_area">
                     Drag-and-drop Game Boy ROMs or .noi / .ihx / .map / .cdb files into this area to view their rom usage.
-                    <div class="drop_delay_note">(Wait for area to turn green before dropping)</div>
+                    <div class="drop_delay_note">(Wait for area to turn green before dropping. Local only: no files leave your computer)</div>
                 </div>
                 <div class="gb_image">
                     <img src="./web/images/icon_gb_200.png" />