feat: dont show image duplicate in beginnign of markdown

lib/documents.ts

@@ -132,8 +132,35 @@ export function parseDocument(doc: string) {
     .parse(doc);
 }
 
+function removeFrontmatter(doc: string) {
+  if (doc.trim().startsWith("---")) {
+    return doc.trim().split("---").filter((s) => s.length).slice(1).join("---");
+  }
+  return doc;
+}
+
+export function removeImage(doc: string, imageUrl?: string) {
+  if (!imageUrl) {
+    return doc;
+  }
+  // Remove image from content
+  const first = doc.slice(0, 500);
+  const second = doc.slice(500);
+
+  // Regex pattern to match the image Markdown syntax with the specific URL
+  const pattern = new RegExp(
+    `!\\[.*?\\]\\(${imageUrl.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")}\\)`,
+    "g",
+  );
+
+  // Remove the matched image
+  const updatedMarkdown = first.replace(pattern, "");
+  return updatedMarkdown + second;
+}
+
 export function renderMarkdown(doc: string) {
-  return render(doc, {
+  return render(removeFrontmatter(doc), {
+    baseUrl: SILVERBULLET_SERVER,
     allowMath: true,
   });
 }
@@ -172,4 +199,3 @@ export function getTextOfChild(child: DocumentChild): string | undefined {
   }
   return;
 }
-