diff --git a/back-end/.env.example b/back-end/.env.example
index 8abc227..9731b96 100644
--- a/back-end/.env.example
+++ b/back-end/.env.example
@@ -1,7 +1,10 @@
-NODE_ENV="dev"
+# This .env file is meant for developpement usage, use
+# .env.production for production
+NODE_PORT=3000
+NODE_ENV=dev
 
-DB_HOST="postgres"
-DB_NAME="briques"
-DB_USER="briques_db"
-DB_PASSWORD="briques_password"
-DB_PORT=5432
\ No newline at end of file
+# those values must be the same as in ../docker-compose.dev.yml 
+DB_HOST=localhost
+DB_NAME=briques_db
+DB_USER=briques_llm
+DB_PASSWORD=briques_password_2025
diff --git a/back-end/.env.production b/back-end/.env.production
new file mode 100644
index 0000000..f63a029
--- /dev/null
+++ b/back-end/.env.production
@@ -0,0 +1,6 @@
+NODE_PORT=3000
+NODE_ENV=production
+DB_HOST=briques_postegres
+DB_NAME=briques_db
+DB_USER=briques_llm
+DB_PASSWORD=briques_password_2025