Remove main and add private (#244)

closes #243

Author: hardillb

package.json

@@ -8,7 +8,7 @@
         "type": "git",
         "url": "https://github.com/node-red/node-red-docker.git"
     },
-    "main": "node_modules/node-red/red/red.js",
+    "private": true,
     "scripts": {
         "start": "node $NODE_OPTIONS node_modules/node-red/red.js $FLOWS",
         "debug": "node --inspect=0.0.0.0:9229 $NODE_OPTIONS node_modules/node-red/red.js $FLOWS",