establish a properish Docker environment

scripts/run_docker_image.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# made partly with chatgpt
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+REPO_ROOT="$(dirname "$SCRIPT_DIR")"
+
+IMAGE_NAME="yocto-embedded-course"
+
+docker run -it --rm \
+    -v "$REPO_ROOT:/home/yocto/yocto" \
+    -v "$REPO_ROOT/cache:/opt" \
+    $IMAGE_NAME