Use bcryptjs on the admin site to simplify deployment

This reduces the deployment overheard for OSS users and speeds
up the container build time as no native modules will need to
be built.

pkg/admin/package.json

@@ -10,7 +10,7 @@
   },
   "devDependencies": {
     "@tsconfig/node14": "^1.0.1",
-    "@types/bcrypt": "^5.0.0",
+    "@types/bcryptjs": "^2.4.2",
     "@types/express": "^4.17.12",
     "@types/express-session": "^1.17.3",
     "@types/flat": "^5.0.1",
@@ -31,7 +31,7 @@
     "@adminjs/typeorm": "^2.0.0",
     "@types/react-router-dom": "^5.1.7",
     "adminjs": "5.0.1",
-    "bcrypt": "^5.0.1",
+    "bcryptjs": "^2.4.3",
     "cookie-parser": "^1.4.5",
     "express": "^4.17.1",
     "express-formidable": "^1.2.0",