Change variable type of GRAV_VERSION from ENV to ARG (getgrav#40)

Hartmnt · web-flow · commit ebdf201d5b6d · 2021-03-30T14:36:04.000-06:00
diff --git a/Dockerfile b/Dockerfile
@@ -52,7 +52,7 @@ RUN chown www-data:www-data /var/www
 USER www-data
 
 # Define Grav specific version of Grav or use latest stable
-ENV GRAV_VERSION latest
+ARG GRAV_VERSION=latest
 
 # Install grav
 WORKDIR /var/www
