Apply suggestions from code review

Co-authored-by: Stephen Thompson <s.thompson@ucl.ac.uk>

Author: jeremyestein

config.EXAMPLE/controller.env.EXAMPLE

@@ -1,5 +1,5 @@
 # This is an EXAMPLE file, do not put real secrets in here.
-# Copy it to ./config/*.env and then DELETE THIS COMMENT.
+# Copy it to ../config/controller.env and then DELETE THIS COMMENT.
 UDS_DBNAME="fakeuds"
 UDS_USERNAME="inform_user"
 UDS_PASSWORD="inform"

config.EXAMPLE/exporter.env.EXAMPLE

@@ -1,5 +1,5 @@
 # This is an EXAMPLE file, do not put real secrets in here.
-# Copy it to ./config/*.env and then DELETE THIS COMMENT.
+# Copy it to ../config/exporter.env and then DELETE THIS COMMENT.
 # When does the exporter run
 EXPORTER_CRON_SCHEDULE="14 5 * * *"
 FTPS_HOST=myftps.example.com

config.EXAMPLE/hasher.env.EXAMPLE

@@ -1,5 +1,5 @@
 # This is an EXAMPLE file, do not put real secrets in here.
-# Copy it to ./config/*.env and then DELETE THIS COMMENT.
+# Copy it to ../config/hasher.env and then DELETE THIS COMMENT.
 HASHER_API_AZ_CLIENT_ID=
 HASHER_API_AZ_CLIENT_PASSWORD=
 HASHER_API_AZ_TENANT_ID=