feat(api): Add source link to recipe description

app.py

@@ -252,7 +252,8 @@ def add_recipe():
             response_data = {"message": "Recipe already exists"}
             return jsonify(response_data), 400
         xcf_recipe = get_recipe_from_xiachufang(url)
-        description = ""
+        description = "<a href=\"" + url + "\">" + '来源' + "</a>"
+        description += "<br>"
         if xcf_recipe['ingredients']:
             description += "<h2>用料</h2>\n"
             description += "<ul>\n"