add dev scripts.

dev/exec

@@ -0,0 +1,10 @@
+#!/bin/sh
+cd "$(dirname "$0")"
+
+# start component watch
+docker run --rm -it \
+    --user "$(id -u):$(id -g)" \
+    --volume "${PWD}/../:/app" \
+    --entrypoint="/bin/bash" \
+    --workdir="/app" \
+    node:16-buster-slim