「在此應用程序中未檢測到默認語言」，同時在Heroku上爲應用程序使用多個Buildpacks

Question

我在Heroku中部署兩個nodejs項目 -
NodejsExpressApp1和NodejsConsoleApp1。

我已經添加到應用程序根目錄下的文件Procfile包含以下內容 -
web: node NodejsExpressApp1/app.js
worker: node NodejsConsoleApp1/app.js

而且我已經設置了BUILD_DIR配置VAR到NodejsExpressApp1文件夾。

本地一切工作正常。

如下圖所示我得到什麼，同時部署 -

c:\ExpressMultiProjectApp2>git push heroku master 
Counting objects: 1506, done. 
Delta compression using up to 4 threads. 
Compressing objects: 100% (1401/1401), done. 
Writing objects: 100% (1506/1506), 4.85 MiB | 92.00 KiB/s, done. 
Total 1506 (delta 269), reused 0 (delta 0) 
remote: Compressing source files... done. 
remote: Building source: 
remote: 
remote: !  No default language could be detected for this app. 
remote:       HINT: This occurs when Heroku cannot detect  the buildpack to use for this application automatically. 
remote:       See  https://devcenter.heroku.com/articles/buildpacks 
remote: 
remote: !  Push failed 
remote: Verifying deploy... 
remote: 
remote: !  Push rejected to sheltered-mesa-74202. 
remote: 
To https://git.heroku.com/sheltered-mesa-74202.git 
! [remote rejected] master -> master (pre-receive hook declined) 
error: failed to push some refs to 'https://git.heroku.com/sheltered-mesa-74202.git'` 

謝謝！

Answer 1

問題是在應用程序根目錄創建後固定的package.json文件 -

{ 
    "name": "nodejs-express-app1", 
    "version": "0.0.0", 
    "description": "Multiple Buildpacks App", 
    "author": { "name": "SimonBor" }, 
    "dependencies": { 
     "express": "~4.9.0" 
    } 
} 

設置變量BUILD_DIR是沒有必要的一步。

當然，這不是最佳實踐解決方案，但它允許我繼續發展。
我會更樂意提供更好的解決方案。

此致敬禮！