diff --git a/.config/docker_example.env b/.config/docker_example.env
new file mode 100644
index 000000000..9ae06cdff
--- /dev/null
+++ b/.config/docker_example.env
@@ -0,0 +1,4 @@
+# db settings
+POSTGRES_PASSWORD=example-dolphin-pass
+POSTGRES_USER=example-dolphin-user
+POSTGRES_DB=dolphin
diff --git a/.gitignore b/.gitignore
index 81736faab..6eaf8fda1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,7 +11,7 @@
 # config
 /.config/*
 !/.config/example.yml
-!/.config/mongo_initdb_example.js
+!/.config/docker_example.env
 
 # dolphin
 /build