构建成功，但仍然出现内部服务器错误。
请帮助解决此问题，生成消息如下：-
-----> Node.js app detected
-----> Creating runtime environment
NPM_CONFIG_LOGLEVEL=error
NODE_VERBOSE=false
NODE_ENV=production
NODE_MODULES_CACHE=true
-----> Installing binaries
engines.node (package.json): 10.6.0
engines.npm (package.json): unspecified (use default)
Resolving node version 10.6.0...
Downloading and installing node 10.6.0...
Using default npm version: 6.1.0
-----> Restoring cache
Loading 2 from cacheDirectories (default):
- node_modules
- bower_components (not cached - skipping)
-----> Building dependencies
Installing node modules (package.json + package-lock)
audited 492 packages in 2.222s
found 0 vulnerabilities -----> Caching build
Clearing previous node cache
Saving 2 cacheDirectories (default):
- node_modules
- bower_components (nothing to cache)
-----> Pruning devDependencies
removed 66 packages and audited 355 packages in 2.11s
found 0 vulnerabilities
-----> Build succeeded!
-----> Discovering process types
Procfile declares types -> (none)
Default types for buildpack -> web
-----> Compressing...
Done: 22.6M
-----> Launching...
Released v14
https://young-forest-74580.herokuapp.com/ deployed to Heroku