diff --git a/Dockerfile b/Dockerfile
index ee97f6e..48280a7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,9 +2,7 @@ FROM nginx:alpine
 
 WORKDIR /usr/share/nginx/html
 
-RUN rm -f index.html && \
-   # xxx not great for files that dont end like: .js.gz .wasm.gz
-   sed -i 's/js;/js gz;/' /etc/nginx/mime.types
+RUN rm -f index.html
 
 COPY default.conf /etc/nginx/conf.d/
 
diff --git a/default.conf b/default.conf
index 728de58..45123c1 100644
--- a/default.conf
+++ b/default.conf
@@ -29,7 +29,7 @@ server {
         add_header  Vary  Origin;
     }
 
-    # customization - like above but with `Content-Encoding` header
+    # customization - like 1st location, but with `Content-Type` & `Content-Encoding` headers
     location ~\.(js|wasm)\.gz$ {
         root   /usr/share/nginx/html;
         add_header  Access-Control-Allow-Origin  *;
@@ -37,6 +37,8 @@ server {
         add_header  Access-Control-Allow-Headers  Accept-Encoding,Accept-Language,Authorization,Cache-Control,Content-Length,Content-Range,DNT,Pragma,Range,X-Requested-With;
         add_header  Vary  Origin;
 
+        types { }
+        default_type  application/javascript;
         add_header  Content-Encoding gzip;
     }