Remove mariadb dependencies (#475)

Author: frenck

proxy-manager/Dockerfile

@@ -30,7 +30,6 @@ RUN \
         certbot=2.6.0-r0 \
         libcap=2.69-r0 \
         logrotate=3.21.0-r1 \
-        mariadb-client=10.11.5-r0 \
         nginx-mod-stream=1.24.0-r7 \
         nginx=1.24.0-r7 \
         nodejs=18.18.2-r0 \
@@ -119,7 +118,6 @@ RUN \
         /tmp/* \
         /usr/lib/node_modules \
         /usr/local/share/.cache \
-        /var/lib/mysql \
         /var/lib/nginx \
         /var/log/nginx \
         /var/tmp/nginx \