add recursive search

src/ciclostile/web/api.py

@@ -1,4 +1,6 @@
 import os
+from glob import glob
+
 from flask import Blueprint, send_from_directory, render_template, request, jsonify
 from flask_httpauth import HTTPDigestAuth
 import ciclostile
@@ -56,5 +58,5 @@ POST_DIR = "."
 
 @api.route("/posts")
 def posts_list():
-    dirs = os.listdir(os.path.join(POST_DIR))
-    return jsonify(dirs)
+    posts = glob(f"{POST_DIR}/**/*.md", recursive=True)
+    return jsonify(posts)