diff --git a/.env.example b/.env.example
index 13bdeb3..c6d7b37 100644
--- a/.env.example
+++ b/.env.example
@@ -4,7 +4,10 @@ POSTGRES_USER=cactoide
 POSTGRES_PASSWORD=cactoide_password
 POSTGRES_PORT=5432
 
+# localhost
 DATABASE_URL="postgres://cactoide:cactoide_password@localhost:5432/cactoied_database"
+# docker
+# DATABASE_URL="postgres://cactoide:cactoide_password@postgres:5432/cactoied_database"
 
 # Application configuration
 APP_VERSION=latest