update readme

Author: sunu

pipeline/README.md

@@ -1,9 +1,15 @@
 ## Usage
 
-Generate the past 10 minutes of OSM data starting at a sequence number (5652386 in this example)
+Generate an hour of OSM data starting at 2024-05-18 02:00 UTC:
+
+Note:
+- The date and hour is UTC
+- The hour needs to be in the format `HH` (e.g. `02` for 2am)
+- The output will be in the `data` directory in the current working directory under a subdirectory named after the date and hour
+
+```sh
 
-```
 docker build -t osm-gradient .
-docker run -t osm-gradient 5652386 10
-docker run -it -v ./data:/tmp ghcr.io/osgeo/gdal:alpine-small-latest sh ogr2ogr -f "FlatGeobuf" /tmp/test.fgb /tmp/2023-09-01T01_00.geojsonld -skipfailures
+docker run -it -v ./data:/tmp osm-gradient sh -c "./cli.js process-hour 2024-05-18 02"
+docker run -it -v ./data:/tmp osm-gradient sh -c "ogr2ogr -f FlatGeobuf /tmp/2024-05-18T02/2024-05-18T02:00.fgb /tmp/2024-05-18T02/2024-05-18T02:00.geojson -skipfailures"
 ```