Require Node.js 18 (#195)

README.md

@@ -85,7 +85,7 @@ JSKOS Server implements the JSKOS API web service and storage for [JSKOS] data s
 The easiest way to install and use JSKOS Server is with Docker and Docker Compose. Please refer to [our Docker documentation](https://github.com/gbv/jskos-server/blob/master/docker/README.md) for more information and instructions.
 
 ### Dependencies
-You need Node.js 14 or later to run jskos-server (16 recommended). You need to have access to a [MongoDB database](https://docs.mongodb.com/manual/installation/).
+You need Node.js 18 to run JSKOS Server[^nodejs]. You need to have access to a [MongoDB database](https://docs.mongodb.com/manual/installation/) (v5 or v6 recommended).
 
 ### Clone and Install
 ```bash
@@ -2202,3 +2202,4 @@ MIT © 2018 Verbundzentrale des GBV (VZG)
 
 [login-server]: https://github.com/gbv/login-server
 [jskos-validate]: https://github.com/gbv/jskos-validate
+[^nodejs]: In theory, Node.js 16 or even 14 should work as well, but as of JSKOS Server 2.0.0, we decided to require Node.js 18 due to the [upcoming early EOL of Node.js 16](https://nodejs.org/en/blog/announcements/nodejs16-eol).

package.json

@@ -9,7 +9,7 @@
   "type": "module",
   "exports": "./server.js",
   "engines": {
-    "node": ">=14"
+    "node": ">=18"
   },
   "scripts": {
     "test": "NODE_ENV=test mocha --loader=esmock --exit --timeout 20000 --slow 2000",