diff --git a/docs/configuration.md b/docs/configuration.md
index 881dc3c..4be5f52 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -1,12 +1,15 @@
 # Configuration
 
-Code reads its configuration from the environment variables.
 All configuration is done through environment variables.
 
 Not all of these are necessary to run the code. The most important ones are:
 
 - `DIGITALOCEAN_POSTGRES` pointing to the working Postgres database
 
+Environment for production deployments is configured through Terraform, see [infra.md](./infra.md) for details.
+
+For local development you can write `.env` file by hand or import it from Heroku with `heroku config -s -a metaforecast-backend` and then modify accordingly.
+
 There's also a template configuration file in `../env.example`.
 
 ## Database endpoints