Update Dockerfile to have tmux and gdbserver

Author: qhdwight

docker/Dockerfile

@@ -5,8 +5,8 @@ RUN apt-get update -y
 RUN apt-get install -y apt-transport-https
 
 RUN apt-get install -y \
-    build-essential cmake pkg-config \
-    strace curl wget gcc zsh vim gdb git netcat \
+    build-essential gdbserver cmake pkg-config \
+    strace curl wget gcc zsh vim gdb git netcat tmux \
     procps python3 python3-pip python3-dev file binutils sudo locales
 
 RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen && locale-gen