fix: docker

Dockerfile

@@ -9,8 +9,8 @@ WORKDIR /usr/share/nginx/html
 RUN mkdir -p /usr/share/nginx/html/admin
 RUN mkdir -p /usr/share/nginx/html/static
 RUN mkdir -p /etc/nginx/conf.d/
-
-COPY nginx.conf /etc/nginx/conf.d/nginx.conf
+RUN echo "client_max_body_size 1024m;\
+underscores_in_headers on;" > /etc/apk/repositories
 
 ADD flarum-ui.tar.gz /usr/share/nginx/html/
 ADD flarum-ui.tar.gz /usr/share/nginx/html/admin/