Updated Debian and added more tools

Dockerfile

@@ -1,6 +1,6 @@
-FROM debian:11-slim
+FROM debian:12-slim
 RUN apt-get update && apt-get install -y apache2 \
-    curl netcat nmap openssl iputils-ping dnsutils \
-    ntpdate net-tools \
+    curl netcat-openbsd nmap openssl iputils-ping dnsutils \
+    ntpdate net-tools mbpoll snmp \
     && apt-get clean
 CMD ["/bin/bash"]