[fix] do not get external link for node

soup.py

@@ -7,9 +7,19 @@ from bs4 import BeautifulSoup
 
 
 
-def re_link(link):
-    urls = re.findall(r'href=[\'"]?([^\'" >]+)', link)
-    return urls
+def get_node_link(node_contend: str):
+    node_soup = BeautifulSoup(node_content, "lxml")
+
+    temp_link = node_soup.find_all(name='a',class_='internal-link')
+    node_link = set()
+    for i in temp_link:
+        i = i.get("href")
+
+        if i == "":
+            continue
+
+        node_link.add(i)
+    return node_link
 
 
 def new_section(soup):
@@ -59,7 +69,7 @@ def soup_link():
                     break
 
             node_id_link =  '/' + file_name + '/#'  +node_element["id"]
-            node_dict["links"] = re_link(node_content)
+            node_dict["links"] = get_node_link(node_content)
             node_dict["id-link"] = node_id_link
             node_dict["backlinks"] = []
             nodes_dict[node_element["id"]] = node_dict