Update docs.

README.md

@@ -10,7 +10,7 @@ direwolf logs into a REST API in JSON format.
 1. Set up database file with `python init_db.py`.
 2. Run `app.py` with either a Python call or a real WSGI server.
 You can use screen to detach the session.
-    - Default URL is http://127.0.0.1:5000
+    - Default URL is http://127.0.0.1:5001
     - Example `waitress` and `screen` scripts are included, see
       - `api_waitress.py` and
       - `start-aprs_api.sh`
@@ -20,6 +20,9 @@ You can use screen to detach the session.
 -`/packets` - gives the most recent packets, sorted descending by time received.
     - argument `n` will return a specific number of packets, default 10. E.g.,
     `https://digi.w1cdn.net/aprs_api/packets?n=1` returns one packet.
+    - argument `from` will return packets from the named station-SSID (no wildcards).
+    E.g., `https://digi.w1cdn.net/aprs_api/packets?n=1&from=W1CDN-1` returns
+    one packet from W1CDN-1.
 
 Example of an object packet sent by W1CDN-1 and digipeated by K0UND-2:
 ```