update readme

README.md

@@ -70,7 +70,7 @@ pywis-pubsub subscribe --config pywis-pubsub.yml
 wis2-gdc register /path/to/wcmp2-file.json
 
 # loading metadata manually (directory of .json files)
-wis2-gdc register /path/to/dir/or/wcmp2-files
+wis2-gdc register /path/to/dir/of/wcmp2-files
 
 # loading metadata from a known harvest endpoint
 
@@ -93,7 +93,7 @@ The Docker setup uses Docker and Docker Compose to manage the following services
 - **wis2-gdc-broker**: MQTT broker
 - **wis2-gdc-management**: management service to ingest, validate and publish discovery metadata published from a WIS2 Global Broker instance
   - the default Global Broker connection is to NOAA.  This can be modified in `wis2-gdc.env` to point to a different Global Broker
-- ** wis2-gdc-backend**: API search engine backend (default Elasticsearch)
+- **wis2-gdc-backend**: API search engine backend (default Elasticsearch)
 
 See [`wis2-gdc.env`](wis2-gdc.env) for default environment variable settings.