feat: add videodb media index with Docker stack

- Add videodb PHP/MySQL media collection manager (Blu-ray, DVD, CD)
- Dockerfile: PHP 8.1 + Apache with GD/mysqli/exif extensions
- docker-compose.yml: app on port 6761 + MySQL 8.0 with health checks
- docker-entrypoint.sh: auto-generates config.inc.php from env vars,
  waits for MySQL, initializes DB schema idempotently
- init-db.php: CLI schema installer using app's own prefix_query() logic
- Persistent volumes for DB, cache, and cover images

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

videodb/templates/elegant/footer.tpl

@@ -0,0 +1,52 @@
+{*
+  This is the footer which is displayed on bottom of every page
+  $Id: footer.tpl,v 1.7 2008/10/19 10:45:28 andig2 Exp $
+*}
+
+<!-- {$smarty.template} -->
+
+<div id="footer" style="clear:both;">
+
+    <div id="footerimage">
+        {if !empty($pdf)}
+            <a href="{$pdf}export=pdf&amp;ext=.pdf"><img src="images/pdfexport.png" /></a>
+        {/if}
+        {if !empty($xls)}
+            <a href="{$xls}export=xls&amp;ext=.xls"><img src="images/xlsexport.png" /></a>
+        {/if}
+        {if !empty($xml)}
+            <a href="{$xml}export=xml" target="_blank"><img src="images/xmlexport.png" /></a>
+        {/if}
+        {if !empty($rss)}
+            <a href="{$rss}export=rss" target="_blank"><img src="images/rssexport.png" /></a>
+        {/if}
+    </div>
+
+    <div id="footerversion">
+        <a href="https://github.com/andig/videodb.git">v{$version|strip|replace:"_":"."}</a>
+    </div>
+
+    <div id="footerpages">
+        <a href="#top"><img src="images/top.gif" alt=""/></a>
+
+        {if !empty($pageno) && !empty($maxpageno)}
+            {if $pageno != 1}<a href="?pageno={$pageno-1}">&#171;</a>{/if}
+            Page <span id="pageno">{$pageno}</span> of <span id="maxpageno">{$maxpageno}</span>
+            {if $pageno != $maxpageno}<a href="?pageno={$pageno+1}">&#187;</a>{/if}
+            &nbsp;
+        {/if}
+        {if !empty($totalresults)}<span id="count">{$totalresults}</span> {$lang.records}.{/if}
+    </div>
+{*
+    {if $loggedin}<span> {$lang.loggedinas} {$loggedin}</span>{/if}
+*}
+</div>
+<!-- /footer -->
+
+</div>
+<!-- /container -->
+
+{$DEBUG}
+
+</body>
+</html>