Add package whitelist for smaller npm package size

Also add issue tracker and homepage link to package file.

package.json

@@ -20,10 +20,15 @@
   "license": "AGPL-3.0-or-later",
   "type": "module",
   "main": "index.js",
+  "files": [
+    "lib"
+  ],
   "funding": {
     "type": "foundation",
     "url": "https://small-tech.org/fund-us/"
   },
+  "homepage": "https://github.com/small-tech/auto-encrypt",
+  "bugs": "https://github.com/small-tech/auto-encrypt/issues",
   "repository": {
     "type": "git",
     "url": "https://github.com/small-tech/auto-encrypt.git"