updating README

Author: geospatial-jeff

README.md

@@ -1,2 +1,28 @@
 # stac-updater
-Keep your STAC catalog updated with SQS / SNS.
+CLI for building and deploying an AWS service designed to update and maintain STAC (via Lambda/SNS/SQS).  
+
+# Installation
+```
+git clone https://github.com/geospatial-jeff/stac-updater
+cd stac-updater
+python setup.py develop
+```
+
+# Usage
+Use the [stac-updater CLI](stac_updater/cli.py) to build and deploy your service.  Updating a static collection, for example, is accomplished as follows:
+
+```
+# Start a new service
+stac-updater new-service
+
+# Build AWS resources to update collection
+stac-updater update-collection --name landsat-8-l1 --root https://stac.com/landsat-8-l1/catalog.json
+
+# Modify kickoff event source to s3:ObjectCreated
+stac-updater modify-kickoff --type s3 --bucket_name stac-updater-kickoff
+
+# Deploy the service to AWS
+stac-updater deploy
+```
+
+Once deployed, any STAC Item uploaded to the `stac-updater-kickoff` bucket will be ingested by the service and added to the `https://stac.com/landsat-8-l1/catalog.json` collection.