diff --git a/Dockerfile b/Dockerfile
index 6db3543..3639170 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,10 +1,10 @@
 
-FROM --platform=arm64 nginx
+FROM --platform=${ARCH} nginx
 EXPOSE 80
 
 # actual web content
 COPY www/ /usr/share/nginx/html
-RUN chmod -R 444 /usr/share/nginx/html
+RUN chmod -R +rX /usr/share/nginx/html
 
 # nginx config files
 COPY conf/nginx.conf /etc/nginx/nginx.conf