chore(haproxy): set stable haproxy 3.15 LTS

docker/haproxy/Dockerfile

@@ -1,4 +1,6 @@
-FROM haproxy:2.3-alpine as production
+FROM haproxy:lts-alpine3.15 as production
+
+USER root
 RUN apk add openssl certbot py-pip
 RUN pip install certbot-plugin-gandi
 
@@ -6,8 +8,9 @@ COPY letsencrypt-hook-deploy-concatenante.sh /
 COPY letsencrypt.sh /usr/local/sbin/
 COPY letsencrypt-renew-cron.sh /etc/periodic/daily/letsencrypt-renew
 COPY auto-generate-certs.sh /usr/local/sbin/
+
 COPY docker-entrypoint.sh /usr/local/bin/
-RUN rm /docker-entrypoint.sh
 RUN ln -s /usr/local/bin/docker-entrypoint.sh /
 RUN chmod 775 docker-entrypoint.sh
+
 ADD haproxy.conf /usr/local/etc/haproxy/haproxy.cfg