Removed root group for zabbix user in all images. Using nmap without sudo permissions

Dockerfiles/server-mysql/rhel/Dockerfile

@@ -15,7 +15,8 @@ ARG ZBX_SOURCES=https://git.zabbix.com/scm/zbx/zabbix.git
 
 ENV TERM=xterm \
     ZBX_VERSION=${ZBX_VERSION} ZBX_SOURCES=${ZBX_SOURCES} \
-    MIBDIRS=/usr/share/snmp/mibs:/var/lib/zabbix/mibs MIBS=+ALL
+    MIBDIRS=/usr/share/snmp/mibs:/var/lib/zabbix/mibs MIBS=+ALL \
+    NMAP_PRIVILEGED=""
 
 LABEL description="Zabbix server with MySQL database support" \
       maintainer="alexey.pustovalov@zabbix.com" \
@@ -55,7 +56,6 @@ COPY --from=builder ["/tmp/zabbix-${ZBX_VERSION}/database/mysql/create_server.sq
 RUN set -eux && \
     INSTALL_PKGS="bash \
             tini \
-            sudo \
             traceroute \
             nmap \
             fping \
@@ -102,12 +102,13 @@ RUN set -eux && \
             --system \
             --comment "Zabbix monitoring system" \
             -g zabbix \
-            -G root \
+            -G dialout \
             --uid 1997 \
             --shell /sbin/nologin \
             --home-dir /var/lib/zabbix/ \
         zabbix && \
-    echo "zabbix ALL=(root) NOPASSWD: /usr/bin/nmap" >> /etc/sudoers.d/zabbix && \
+    chgrp zabbix /usr/bin/nmap && \
+    setcap cap_net_raw+eip /usr/bin/nmap && \
     mkdir -p /etc/zabbix && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /usr/lib/zabbix/alertscripts && \