Add tz as argument

other_installers/docker/Dockerfile

@@ -1,5 +1,6 @@
 FROM ubuntu:18.04
-ENV TZ=Europe/Rome
+ARG tz_buildtime=Europe/Rome
+ENV TZ=$tz_buildtime
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
 # Make sure that all updates are in place

other_installers/docker/README.md

@@ -20,7 +20,7 @@ curl https://get.docker.com | /bin/bash
 git clone https://github.com/CIRCL/AIL-framework.git
 cd AIL-framework
 cp -r ./other_installers/docker/Dockerfile ./other_installers/docker/docker_start.sh ./other_installers/docker/pystemon ./
-docker build -t ail-framework .
+docker build --build-arg tz_buildtime=YOUR_GEO_AREA/YOUR_CITY -t ail-framework .
 ```
 3. To start AIL on port 7000, type the following command below:
 ```