Update README.md

Author: dhh

README.md

@@ -43,6 +43,8 @@ production:
     migrations_paths: db/queue_migrate
 ```
 
+Note: Calling `bin/rails solid_cache:install` will automatically add `config.solid_queue.connects_to = { database: { writing: :queue } }` to `config/environments/production.rb`, so no additional configuration is needed there (although you must make sure that you use the `queue` name in `database.yml` for this to match!). But if you want to use Solid Queue in a different environment (like staging or even development), you'll have to manually add that `config.solid_queue.connects_to` line to the respective environment file. And, as always, make sure that the name you're using for the database in `config/database.yml` matches the name you use in `config.solid_queue.connects_to`.
+
 Then run `db:prepare` in production to ensure the database is created and the schema is loaded.
 
 Now you're ready to start processing jobs by running `bin/jobs` on the server that's doing the work. This will start processing jobs in all queues using the default configuration. See [below](#configuration) to learn more about configuring Solid Queue.