Try to fix cloudflare caches

stacks/recipe/Dockerfile

@@ -1,8 +1,9 @@
 # Use the lightweight Nginx image
 FROM nginx:alpine
 
-# Copy everything from your repository into the Nginx serving directory
-COPY ./ /usr/share/nginx/html
+COPY nginx/default.conf /etc/nginx/conf.d/default.conf
+COPY index.html /usr/share/nginx/html/
+COPY js /usr/share/nginx/html/js
+COPY css /usr/share/nginx/html/css
 
-# Tell Docker this container listens on port 80
 EXPOSE 80