diff --git a/README.md b/README.md
index 76cadc7..113fc62 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,7 @@ This app can be hosted wherever Ruby is supported and PostgreSQL databases can b
 
 [![Deploy to Render](https://render.com/images/deploy-to-render-button.svg)](https://render.com/deploy?repo=https://github.com/ryanwi/rails7-on-docker)
 
+Set `SECRET_KEY_BASE` environment variable
 
 ## Credits/References
 
diff --git a/production.Dockerfile b/production.Dockerfile
index e3da282..c70aaa4 100644
--- a/production.Dockerfile
+++ b/production.Dockerfile
@@ -32,8 +32,9 @@ COPY . .
 ARG SECRET_KEY_BASE=fakekeyforassets
 RUN bin/rails assets:clobber && bundle exec rails assets:precompile
 
+# This is an approach for deploying to Render. It is not great, maybe there's a better way?
+# https://community.render.com/t/release-command-for-db-migrations/247/6
 ARG DATABASE_URL
-# RUN printenv
 RUN bin/rails db:migrate
 
 EXPOSE 3000