Update according to https://github.com/nginxinc/docker-nginx/blob/master/mainline/alpine/Dockerfile

Author: yechs

Dockerfile

@@ -138,11 +138,12 @@ RUN GPG_KEYS=B0F4253373F8F6F510D42178520A9993A1C052F8 \
 	&& apk add --no-cache --virtual .gettext gettext \
 	&& mv /usr/bin/envsubst /tmp/ \
 	\
-	&& runDeps="$( \
-		scanelf --needed --nobanner --format '%n#p' /usr/sbin/nginx /usr/lib/nginx/modules/*.so /tmp/envsubst \
-			| tr ',' '\n' \
+    && runDeps="$( \
+		scanelf --needed --nobanner /usr/sbin/nginx /usr/lib/nginx/modules/*.so /tmp/envsubst \
+			| awk '{ gsub(/,/, "\nso:", $2); print "so:" $2 }' \
+			| sort -u \
+			| xargs -r apk info --installed \
 			| sort -u \
-			| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
 	)" \
 	&& apk add --no-cache --virtual .nginx-rundeps $runDeps \
 	&& apk del .build-deps \