use nginx:stable-alpine as base image

Dockerfile

@@ -1,10 +1,13 @@
-FROM alpine
+FROM nginx:stable-alpine AS builder
 
 COPY compile.sh /tmp/compile.sh
 RUN chmod +x /tmp/compile.sh && \
     /tmp/compile.sh && \
     rm -rf /tmp/*
 
+FROM nginx:stable-alpine
+
+COPY --from=builder /*.so /usr/local/nginx/modules/
 COPY entrypoint.sh /opt/entrypoint.sh
 COPY confs/ /opt/confs
 COPY scripts/ /opt/scripts
@@ -14,8 +17,7 @@ COPY lua/ /opt/lua
 
 RUN apk --no-cache add php7-fpm certbot libstdc++ libmaxminddb geoip pcre yajl fail2ban clamav apache2-utils rsyslog openssl lua libgd && \
     chmod +x /opt/entrypoint.sh /opt/scripts/* && \
-    mkdir /opt/entrypoint.d && \
-    adduser -h /dev/null -g '' -s /sbin/nologin -D -H nginx
+    mkdir /opt/entrypoint.d
 
 VOLUME /www /http-confs /server-confs /modsec-confs /modsec-crs-confs