Also added symlinks for /etc/localtime

Dockerfile

@@ -21,7 +21,9 @@ RUN apt install -y net-tools iputils-ping tcpdump traceroute iproute2 iptables i
 
 RUN apt install -y software-properties-common
 
-RUN apt install -y tzdata
+RUN apt install -y tzdata && \
+    ln -fs /usr/share/zoneinfo/$TZ /etc/localtime && \
+    dpkg-reconfigure --frontend noninteractive tzdata
 
 # Installing locales
 RUN apt install -y locales