Fix linting errors

README.md

@@ -199,11 +199,12 @@ The ports 9300 and 9302 are exposed on the host.
 The ports 9207 and 9307 are exposed on the host.
 
 If the ElasticSearch 7 container is returning the follow error log message:
-```
-max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
-```
+
+`max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]`
+
 Run the following command in a terminal to set the system's max map count.
-```
+
+```bash
 sysctl -w vm.max_map_count=262144
 ```
 

scripts/commodities.rb

@@ -134,7 +134,7 @@ def provision_commodities(root_loc, new_containers)
   # If you later modify .commodities to allow this to run again (e.g. if you've added new apps to your group),
   # you'll need to delete the postgres container and it's volume else you'll get errors.
   # Do a fullreset, or docker-compose rm -v -f postgres-13
-  ['13', '17'].each do |postgres_version|
+  %w(13, 17).each do |postgres_version|
     provision_postgres(root_loc, new_containers, postgres_version)
     # Alembic, too
     provision_alembic(root_loc, postgres_version)