Added support for md files

lightrag/api/static/index.html

@@ -112,14 +112,14 @@
           <form id="uploadForm" class="space-y-4">
             <!-- Drop Zone -->
             <div class="drop-zone rounded-lg p-8 text-center cursor-pointer">
-              <input type="file" id="fileInput" class="hidden" multiple accept=".pdf,.txt,.doc,.docx">
+              <input type="file" id="fileInput" class="hidden" multiple accept=".pdf,.md,.txt,.doc,.docx">
               <div class="flex flex-col items-center">
                 <svg class="w-12 h-12 text-slate-400 mb-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                   <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
                         d="M7 16a4 4 0 01-.88-7.903A5 5 0 1115.9 6L16 6a5 5 0 011 9.9M15 13l-3-3m0 0l-3 3m3-3v12" />
                 </svg>
                 <p class="text-slate-700 font-medium">Drop files here or click to upload</p>
-                <p class="text-slate-500 text-sm mt-1">PDF, TXT, DOC, DOCX (Max 10MB)</p>
+                <p class="text-slate-500 text-sm mt-1">PDF, MD, TXT, DOC, DOCX (Max 10MB)</p>
               </div>
             </div>