Add a script to build and run sdl example in a docker container

docker/build-example-sdl-ubuntu.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+cd ${SCRIPT_DIR}/..
+
+echo -e "
+FROM ubuntu:22.04
+
+RUN apt-get -qq update                    \
+    && apt-get install wget libfreetype-dev libfontconfig-dev libcurl4 gcc libsdl2-2.0-0 libgl1 -qq -y --no-install-recommends --no-install-suggests \
+    && mkdir -p /tmp/dmd/ && cd /tmp/dmd \
+    && wget -q --no-check-certificate https://downloads.dlang.org/releases/2.x/2.106.1/dmd_2.106.1-0_amd64.deb \
+    && dpkg -i /tmp/dmd/dmd_2.106.1-0_amd64.deb \
+    && rm -rf /tmp/dmd
+" | docker build --network=host -t ubuntu-nanogui -
+
+xhost +local:docker
+
+SCALE=1
+
+if [[ ! -z $1 ]];
+then 
+    SCALE=$1
+fi
+
+docker run -it --rm                            \
+    -e DISPLAY=$DISPLAY                        \
+    -v /tmp/.X11-unix:/tmp/.X11-unix           \
+    -v $(pwd):/src                             \
+    -v $HOME/.dub/:/root/.dub                  \
+    -w /src                                    \
+    --network host                             \
+    ubuntu-nanogui                             \
+    bash -c "cd /src/examples/sdl/ && dub run -- --scale $SCALE"