doc update

Signed-off-by: Clemens Vasters <[email protected]>

gtfs/CONTAINER.md

@@ -172,3 +172,23 @@ Instances providing the information explained above. Just click the button below
 [![Deploy to Azure](https://aka.ms/deploytoazurebutton)](https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.githubusercontent.com%2Fclemensv%2Freal-time-sources%2Fmain%2Fgtfs%2Fazure-template.json)
 
 
+### Example
+
+The following example shows how to start the bridge with a set of feeds for the
+Seattle metropolitan area, sending to an Event Hub.
+
+The corresponding entries in the mobility database are:
+*  [Puget Sound Consolidated GTFS](https://mobilitydatabase.org/feeds/mdb-1080)
+*  [King County Metro GTFS-RT Trip Updates](https://mobilitydatabase.org/feeds/mdb-1540)
+*  [King County Metro GTFS-RT Vehicle Positions](https://mobilitydatabase.org/feeds/mdb-1542)
+*  [King County Metro GTFS-RT Alerts](https://mobilitydatabase.org/feeds/mdb-1541)
+
+```shell
+$ docker run --rm \
+    -e CONNECTION_STRING='<connection-string>' \
+    -e GTFS_RT_URLS='https://api-endpoint.com/gtfs-rt' \
+    -e GTFS_URLS='https://gtfs.sound.obaweb.org/prod/1_gtfs.zip' \
+    -e GTFS_RT_URLS='https://s3.amazonaws.com/kcm-alerts-realtime-prod/tripupdates.pb,https://s3.amazonaws.com/kcm-alerts-realtime-prod/alerts.pb,https://s3.amazonaws.com/kcm-alerts-realtime-prod/vehiclepositions.pb' \
+    -e AGENCY='KingCountyMetro' \
+    ghcr.io/clemensv/real-time-sources-gtfs:latest
+```