feat: switch to alpine base+edit nginx.conf w/sed

* use epoll
* etag off
* server_tokens off
* tcp_{nopush,nodelay} on
* s/spaces/tabs/

Dockerfile

@@ -11,5 +11,15 @@ RUN hugo --minify --gc=true
 
 WORKDIR /
 
-FROM nginx
+FROM nginx:mainline-alpine
 COPY --from=0 /homepage/public/ /usr/share/nginx/html
+
+# tripple slash reference
+# https://stackoverflow.com/questions/5190966/using-sed-to-insert-tabs/5191165#5191165
+RUN sed -i -e 's/^worker_processes  auto;/worker_processes auto;/'\
+ -e "/^events {$/ a \\\tmulti_accept on;\n\tuse epoll;"\
+ -e "/^http {$/ a \\\tserver_tokens off;\n\tetag off;\n"\
+ -e 's/#tcp_nopush/tcp_nopush/'\
+ -e "/tcp_nopush/ a \\\ttcp_nodelay on;"\
+ -e "s/^    */$(printf '\t')/"\
+ /etc/nginx/nginx.conf