diff --git a/phpcontainer/README.md b/phpcontainer/README.md
index f797ad0..0818c7b 100644
--- a/phpcontainer/README.md
+++ b/phpcontainer/README.md
@@ -8,6 +8,12 @@ You should copy over the php.ini.
 
 In your data directory there should be a public folder for apache.
 
+
+## env file
+
+PHPCONTAINER_IMAGE=4lights/phpcontainer:latest
+VOL_PATH=/project_dir/project/data
+
 ## Docker Compose Extend
 
 Now using extend you can call the service:
diff --git a/phpcontainer/docker-compose.yml b/phpcontainer/docker-compose.yml
index 313ea17..77cc92c 100644
--- a/phpcontainer/docker-compose.yml
+++ b/phpcontainer/docker-compose.yml
@@ -4,7 +4,7 @@ version: "3.3"
 services:
 
   php-apache:
-    image: "4lights/phpcontainer:latest"
+    image: ${PHPCONTAINER_IMAGE:-4lights/phpcontainer:latest}
     restart: always
     volumes:
       - "${VOL_PATH:-./data}/website:/data"