diff --git a/.env.docker.sample b/.env.docker.sample
new file mode 100644
index 0000000..33ebf08
--- /dev/null
+++ b/.env.docker.sample
@@ -0,0 +1,7 @@
+SECRET_MAIN_KEY=refero34o8rfhfjn983thf39fhc943rf923n3h
+ROOT_DIRECTORY=/home/icarus/mydata
+POSTGRES_MAIN_USER=icarus
+POSTGRES_MAIN_PASSWORD=password
+POSTGRES_MAIN_DB=icarus_db
+POSTGRES_MAIN_HOST=main_db
+DATABASE_URL=postgres://${POSTGRES_MAIN_USER}:${POSTGRES_MAIN_PASSWORD}@${POSTGRES_MAIN_HOST}:5432/${POSTGRES_MAIN_DB}
diff --git a/.env.sample b/.env.sample
index 33ebf08..9b60f0e 100644
--- a/.env.sample
+++ b/.env.sample
@@ -3,5 +3,5 @@ ROOT_DIRECTORY=/home/icarus/mydata
 POSTGRES_MAIN_USER=icarus
 POSTGRES_MAIN_PASSWORD=password
 POSTGRES_MAIN_DB=icarus_db
-POSTGRES_MAIN_HOST=main_db
+POSTGRES_MAIN_HOST=localhost
 DATABASE_URL=postgres://${POSTGRES_MAIN_USER}:${POSTGRES_MAIN_PASSWORD}@${POSTGRES_MAIN_HOST}:5432/${POSTGRES_MAIN_DB}