diff -r be2829b59938 -r 59a81a4de989 sbin/docker/Dockerfile
--- a/sbin/docker/Dockerfile	Thu Jan 02 16:30:19 2020 +0100
+++ b/sbin/docker/Dockerfile	Tue Oct 20 11:03:05 2020 +0200
@@ -5,6 +5,7 @@
 		g++ \
 		libtool \
 		make \
+		oniguruma-dev \
 	&& docker-php-ext-install mbstring \
 	&& docker-php-ext-install opcache \
 	&& apk add --update icu-dev \