Add universal raspboot script

utils/raspboot.bash

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+CONTAINER_UTILS="andrerichter/raspi3-utils"
+
+DOCKER_CMD="docker run -it --rm"
+DOCKER_ARG_CURDIR="-v $(pwd):/work -w /work"
+DOCKER_ARG_TTY="--privileged -v /dev:/dev"
+DOCKER_EXEC_RASPBOOT="raspbootcom /dev/ttyUSB0"
+
+$DOCKER_CMD \
+  $DOCKER_ARG_CURDIR \
+  $DOCKER_ARG_TTY \
+  $CONTAINER_UTILS \
+  $DOCKER_EXEC_RASPBOOT \
+  kernel8.img