Update script for packaging inside docker

Author: recrsn

test-docker.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+set -xe
+
+echo "Running on $(node -v)"
+
+# Cleanup
+rm -rf node_modules build-tmp-* lib/binding
+
+# Install build dependencies
+if [ -f /etc/alpine-release ]; then
+  apk add --no-cache --virtual .build-deps make gcc g++ python3
+fi
+
+su node -c "npm test; npx node-pre-gyp package"