add GET method for shortening

urlshort.py

@@ -6,7 +6,7 @@ Usage: python urlshort.py <config.json>
 API (all routes are prefixed with base_path, e.g. /s):
   GET  /                        Frontend (or health check if no static/)
   GET  /api/health              Health check
-  POST /api/shorten             Create a short URL  (no API key required)
+  POST/GET /api/shorten         Create a short URL  (no API key required)
   GET  /api/urls                List all short URLs  (API key required)
   GET  /api/urls/<code>         Get info for a code  (no API key required)
   GET  /api/lookup?url=<url>    Look up by original URL (no API key required)
@@ -357,6 +357,9 @@ class Handler(BaseHTTPRequestHandler):
         elif path == "/api/health":
             self._send_json(200, {"status": "ok", "service": "url-shortener"})
 
+        elif path == "/api/shorten":
+            self._handle_shorten()
+
         elif path == "/api/urls":
             self._handle_list_urls()
 
@@ -433,7 +436,6 @@ class Handler(BaseHTTPRequestHandler):
             self._error(400, "Invalid JSON body")
             return
 
-
         # url: query param takes precedence, then body
         original_url = qs.get("url", [""])[0] or str(body.get("url", "")).strip()
         if not original_url: