diff --git a/INSTALL/Geant4/Dockerfile b/INSTALL/Geant4/Dockerfile
new file mode 100644
index 0000000..8021560
--- /dev/null
+++ b/INSTALL/Geant4/Dockerfile
@@ -0,0 +1,41 @@
+from physino/geant4:sshd
+
+# https://wiki.almalinux.org/repos/Extras.html
+run dnf install -y epel-release && dnf config-manager --set-enabled crb \
+ && curl -LO https://github.com/kasmtech/KasmVNC/releases/download/v1.3.1/kasmvncserver_oracle_9_1.3.1_x86_64.rpm \
+ && dnf localinstall -y kasmvncserver*.rpm && rm -f kasmvncserver*.rpm \
+ && dnf clean all && rm -fr /var/cache/*
+
+run dnf install -y openbox xterm && dnf clean all && rm -fr /var/cache/*
+
+run usermod -a -G kasmvnc-cert root && mkdir -p /root/.vnc \
+ && touch /root/.vnc/.de-was-selected \
+ && echo -e 'geant4\ngeant4\n' | vncpasswd -u root -w -r \
+ && echo 'xsetroot -solid "#538cc6"' > /root/.vnc/xstartup \
+ && echo 'st' >> /root/.vnc/xstartup \
+ && chmod 755 /root/.vnc/xstartup \
+ && mkdir -p /root/.config/openbox \
+ && echo -e '<?xml version="1.0" encoding="UTF-8"?>\n\
+<openbox_menu>\n\
+<menu id="root-menu" label="Openbox 3">\n\
+  <item label="Terminal">\n\
+    <action name="Execute">\n\
+       <command>xterm -fg white -bg black -fs=12</command>\n\
+    </action>\n\
+  </item>\n\
+  <item label="Reconfigure">\n\
+    <action name="Reconfigure" />\n\
+  </item>\n\
+  <item label="Exit">\n\
+    <action name="Exit">\n\
+      <prompt>yes</prompt>\n\
+    </action>\n\
+  </item>\n\
+</menu>\n\
+</openbox_menu>' > /root/.config/openbox/menu.xml \
+ && echo -e 'network:\n  ssl:\n    require_ssl: false\n' > /root/.vnc/kasmvnc.yaml
+
+# 8443 + display number
+expose 8444
+# container exits immediately without "tail"
+cmd vncserver && tail -f ~/.vnc/*.log