diff --git a/config/backdev.env b/config/backdev.env
index a7e5517..732bba6 100644
--- a/config/backdev.env
+++ b/config/backdev.env
@@ -1,3 +1,24 @@
+# PostgreSQL configuration for the main database (backend)
+# These variables are read by Spring Boot's auto-configuration
+SPRING_DATASOURCE_URL=jdbc:postgresql://localhost:5433/backend_db
+SPRING_DATASOURCE_USERNAME=${BACKEND_USER}
+SPRING_DATASOURCE_PASSWORD=${BACKEND_PASSWORD}
+
+# You might also need to explicitly set DDL-auto and initialization mode
+# if you were previously relying on application.properties for these
+# SPRING_JPA_HIBERNATE_DDL_AUTO=update
+# SPRING_SQL_INIT_MODE=never
+
+
+# Original backend database details
+# Keeping these as they might be used to set the values above,
+# or potentially used elsewhere in your setup (though not explicitly seen in provided docker-compose for backend)
+BACKEND_DB=backend_db
+BACKEND_USER=backend_db_user
+BACKEND_PASSWORD=backend_db_user_password
+
+# PostgreSQL configuration for Keycloak's database
+# These variables are used by Keycloak's Docker image setup args
 POSTGRES_DB=postgres_db
 POSTGRES_USER=postgres
 POSTGRES_PASSWORD=postgres_db_user_password
@@ -5,18 +26,19 @@ POSTGRES_PASSWORD=postgres_db_user_password
 KEYCLOAK_ADMIN=admin
 KEYCLOAK_ADMIN_PASSWORD=admin
 KEYCLOAK_HOSTNAME=localhost
+# Note: The KEYCLOAK_DB, KEYCLOAK_USER, KEYCLOAK_PASSWORD below seem unused in the provided Keycloak Dockerfile args,
+# which instead use POSTGRES_DB, POSTGRES_USER, POSTGRES_PASSWORD.
+# Keeping them here for completeness if they are used elsewhere.
 KEYCLOAK_DB=keycloak_db
 KEYCLOAK_USER=keycloak_db_user
 KEYCLOAK_PASSWORD=keycloak_db_user_password
 
-BACKEND_DB=backend_db
-BACKEND_USER=backend_db_user
-BACKEND_PASSWORD=backend_db_user_password
-
-DATABASE_URL=localhost:5433
-
+# Frontend (Vite) configuration
 VITE_KEYCLOAK_URL=http://localhost:7080
 VITE_KEYCLOAK_CLIENT_ID=myinpulse
 VITE_KEYCLOAK_REALM=test
 VITE_APP_URL=http://localhost:8080
 VITE_BACKEND_URL=http://localhost:8081/
+
+# Removed the DATABASE_URL variable as it's replaced by SPRING_DATASOURCE_URL for Spring Boot
+# # DATABASE_URL=localhost:5433
\ No newline at end of file