Use regex for filter condition

src/__main__.py

@@ -1,4 +1,5 @@
 import asyncio
+import re
 from pprint import pprint
 
 import httpx
@@ -6,12 +7,18 @@ import httpx
 from src.link_scraper import get_urlmap
 
 URL = httpx.URL("https://ailab.fai.utb.cz")
+ALLOWED_HOSTS_RE = re.compile(r"(?:.*\.)?utb\.cz")
 
 
 async def main() -> None:
     """Program entrypoint."""
     async with httpx.AsyncClient() as client:
-        url_map = await get_urlmap(client, URL, max_depth=2, filter_condition=lambda url: url.host == URL.host)
+        url_map = await get_urlmap(
+            client,
+            URL,
+            max_depth=5,
+            filter_condition=lambda url: ALLOWED_HOSTS_RE.fullmatch(url.host) is not None,
+        )
 
     pprint(url_map)