Update Dockerfile

Author: Yanni8

Dockerfile

@@ -8,5 +8,4 @@ RUN npm run build
 FROM nginxinc/nginx-unprivileged:1.17
 
 COPY nginx.conf /etc/nginx/conf.d/default.conf
-RUN rm /usr/share/nginx/html/50x.html /usr/share/nginx/html/index.html
 COPY --from=build-stage /app/dist/grades-application-m120/ /usr/share/nginx/html