Resolving Node version error.

Hello I was pretty sure I’ve post this question already, but I can’t find it. Sorry if it’s a duplicate. I’m trying to deploy nodejs app from github but I keep getting following ERROR: failed to build: exit status 1. The full log looks as follows:

[2022-12-05 18:30:28] ╭──────────── buildpack detection ───────────╼
[2022-12-05 18:30:28] │ Detected the following buildpacks suitable to build your app:
[2022-12-05 18:30:28] │ 
[2022-12-05 18:30:28] │    heroku/nodejs-engine   v0.5.1  
[2022-12-05 18:30:28] │    digitalocean/node      v0.3.4  (Node.js)
[2022-12-05 18:30:28] │    digitalocean/procfile  v0.0.3  (Procfile)
[2022-12-05 18:30:28] │    digitalocean/custom    v0.1.1  (Custom Build Command)
[2022-12-05 18:30:28] │ 
[2022-12-05 18:30:28] │ For documentation on the buildpacks used to build your app, please see:
[2022-12-05 18:30:28] │ 
[2022-12-05 18:30:28] │    Node.js  v0.3.4  https://do.co/apps-buildpack-node
[2022-12-05 18:30:28] ╰─────────────────────────────────────────────╼
[2022-12-05 18:30:28] 
[2022-12-05 18:30:28] ╭──────────── app build ───────────╼
[2022-12-05 18:30:28] │ ---> Node.js Buildpack
[2022-12-05 18:30:28] │ ---> Installing toolbox
[2022-12-05 18:30:28] │ ---> - jq
[2022-12-05 18:30:29] │ ---> - yj
[2022-12-05 18:30:29] │ ---> Getting Node version
[2022-12-05 18:30:29] │ ---> Resolving Node version
[2022-12-05 18:30:30] │ ERROR: failed to build: exit status 1
[2022-12-05 18:30:30] │ 
[2022-12-05 18:30:30] │ 
[2022-12-05 18:30:30] │ For documentation on the buildpacks used to build your app, please see:
[2022-12-05 18:30:30] │ 
[2022-12-05 18:30:30] │    Node.js  v0.3.4  https://do.co/apps-buildpack-node
[2022-12-05 18:30:30] │ 
[2022-12-05 18:30:30] │  ✘ build failed

In the package.json I have following declarations:

  "version":"0.0.0",
  "engines": {
    "node": "^18.6.0",
    "npm": "^8.14.0"
  },

I can’t figure out what is the reason. The code works when run locally and also works when deployed to Heroku server. The App Spec is as follows:

databases:
- engine: PG
  name: kbdb
  num_nodes: 1
  size: professional-xs
  version: "12"
envs:
- key: LOCAL_BASE_URL
  scope: RUN_AND_BUILD_TIME
  value: ${APP_URL}
name: kboards-staging
region: fra
services:
- build_command: npm run build
  environment_slug: node-js
  envs:
  - key: DATABASE_URL
    scope: RUN_TIME
    value: ${kbdb.DATABASE_URL}
  - key: KBOARDS_APP_KEY
    scope: RUN_AND_BUILD_TIME
    value: kBoards-staging
  github:
    branch: master
    repo: zpiecuch81/kBoards
  http_port: 8080
  instance_count: 1
  instance_size_slug: professional-s
  name: kboards
  routes:
  - path: /
  run_command: npm start
  source_dir: /

Any idea what might be wrong?