docs(readme): fix instructions for adding new item

space2stats_api/src/README.md

@@ -7,4 +7,10 @@
 - Note that the get types function is reading in a parquet file from the following directory: space2stats_api/src/local.parquet
 - Here is a workflow diagram of the STAC metadata creation:
 
-![Create Stac](../../docs/images/create_stac_workflow.png)
+![Create Stac](../../docs/images/create_stac_workflow.png)
+
+### Adding new ITEM files
+- In link_new_item.py set "Paths and metadata setup" in the main function to point towards the corresponding locally saved parquet file
+- Navigate to the METADATA sub-directory and run the following commands in order:
+    1. get_types.py
+    2. line_new_items.py