diff --git a/README.md b/README.md
index d4a11cc..50320cb 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,12 @@
 # jekyll-dev
 
 Simple container to learn building Dockerfiles.
+
+## Usage
+
+You need a `.env` file which sets the `$LOCAL_HOME` path:
+```sh
+cd /path/to/your/home
+echo "PROJECT_PATH=/path/to/your/home" > .env
+docker-compose up -d
+```
diff --git a/docker-compose.yml b/docker-compose.yml
index 4fa843d..2ccc3fe 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -6,5 +6,5 @@ services:
     build: .
     container_name: container-dev
     volumes:
-      - /home/david:/home/david
+      - ${LOCAL_HOME}:/home/david
     restart: unless-stopped