Update src/server/http.rs

src/server/http.rs

@@ -186,6 +186,10 @@ fn get_content_type(file_path: &str) -> &'static str {
         "audio/mpeg"
     } else if file_path.ends_with(".mp4") {
         "video/mp4"
+    } else if file_path.ends_with(".pdf") {
+        "application/pdf"
+    } else if file_path.ends_with(".md") {
+        "text/markdown"
     } else {
         "text/plain"
     }