diff --git a/back-skeleton/.env.sample b/back-skeleton/.env.sample
index edd4406493c73a3c782297f00196af8d88a90aa3..2e81d52f90a6c419e08c62ed6208cac3087ab681 100644
--- a/back-skeleton/.env.sample
+++ b/back-skeleton/.env.sample
@@ -1,3 +1,3 @@
-DATABASE_USER=
-DATABASE_PASSWORD=
-DATABASE_NAME=
+DATABASE_USER=usr
+DATABASE_PASSWORD=pwd
+DATABASE_NAME=database
diff --git a/back-skeleton/docker-compose.yml b/back-skeleton/docker-compose.yml
index 1915a6783c4f1f5700eb9598adc2142232a3b385..13c4347541e62d8388f4221511ad573af4e317e4 100644
--- a/back-skeleton/docker-compose.yml
+++ b/back-skeleton/docker-compose.yml
@@ -7,11 +7,11 @@ services:
     networks:
       - db
     env_file:
-      - .env
+      - .env.sample
     environment:
-      POSTGRES_USER : ${DATABASE_USER}
-      POSTGRES_PASSWORD: ${DATABASE_PASSWORD}
-      POSTGRES_DB: ${DATABASE_NAME}
+      POSTGRES_USER : usr
+      POSTGRES_PASSWORD: pwd
+      POSTGRES_DB: database
     volumes:
       - db-data:/var/lib/postgresql/data
       - ./initdb:/docker-entrypoint-initdb.d:ro
diff --git a/back-skeleton/src/main/resources/application.properties b/back-skeleton/src/main/resources/application.properties
index fa51bd1222e8582f6ce7ce4505355d904e98ea46..a4d6894569ebafad09d83b8be760a1cd24ffaf39 100644
--- a/back-skeleton/src/main/resources/application.properties
+++ b/back-skeleton/src/main/resources/application.properties
@@ -1,5 +1,5 @@
-spring.datasource.url=jdbc:postgresql://localhost:5432/${DATABASE_NAME}
-spring.datasource.username=${DATABASE_USER}
-spring.datasource.password=${DATABASE_PASSWORD}
+spring.datasource.url=jdbc:postgresql://localhost:5432/${DATABASE_NAME:usr}
+spring.datasource.username=${DATABASE_USER:pwd}
+spring.datasource.password=${DATABASE_PASSWORD:database}
 spring.servlet.multipart.max-file-size=10MB
 spring.servlet.multipart.max-request-size=10MB
\ No newline at end of file