Merge pull request #1373 from dalf/docker-alpine-3-16

Dockerfile: use alpine 3.16

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.15
+FROM alpine:3.16
 ENTRYPOINT ["/sbin/tini","--","/usr/local/searxng/dockerfiles/docker-entrypoint.sh"]
 EXPOSE 8080
 VOLUME /etc/searx