App Crashed with H10 code

After follow this https://forum.strapi.io/t/when-i-open-heroku-i-have-a-problem-with-strapi-with-h10-code/3734

i still have the issues with my app when deploy it on heroku.
here is my heroku logs:

2021-06-06T09:42:51.000000+00:00 app[api]: Build succeeded
2021-06-06T09:43:01.909074+00:00 heroku[web.1]: Starting process with command `npm start`
2021-06-06T09:43:05.977511+00:00 app[web.1]: npm ERR! missing script: start
2021-06-06T09:43:05.993702+00:00 app[web.1]: 
2021-06-06T09:43:05.994008+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2021-06-06T09:43:05.994176+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2021-06-06T09_43_05_978Z-debug.log
2021-06-06T09:43:06.077452+00:00 heroku[web.1]: Process exited with status 1
2021-06-06T09:43:06.711296+00:00 heroku[web.1]: State changed from starting to crashed
2021-06-06T09:46:44.148926+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=getexpressvn.herokuapp.com request_id=93a8f77e-96dc-42c1-8365-443610f3b478 fwd="27.65.54.213" dyno= connect= service= status=503 bytes= protocol=https
2021-06-06T09:46:44.950462+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=getexpressvn.herokuapp.com request_id=b39396ce-41ae-4d5c-91c8-069eef446f7a fwd="27.65.54.213" dyno= connect= service= status=503 bytes= protocol=https

here is my buid logs:

remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> Building on the Heroku-20 stack
remote: -----> Determining which buildpack to use for this app
remote: -----> Node.js app detected
remote:        
remote: -----> Creating runtime environment
remote:        
remote:        NPM_CONFIG_LOGLEVEL=error
remote:        NODE_VERBOSE=false
remote:        NODE_ENV=production
remote:        NODE_MODULES_CACHE=true
remote:        
remote: -----> Installing binaries
remote:        engines.node (package.json):  unspecified
remote:        engines.npm (package.json):   unspecified (use default)
remote:        
remote:        Resolving node version 14.x...
remote:        Downloading and installing node 14.17.0...
remote:        Using default npm version: 6.14.13
remote:        
remote: -----> Installing dependencies
remote:        Installing node modules (package.json)
remote:        
remote:        27 packages are looking for funding
remote:          run `npm fund` for details
remote:        
remote:        found 0 vulnerabilities
remote:        
remote:        
remote: -----> Build
remote:        
remote: -----> Caching build
remote:        - node_modules
remote:        
remote: -----> Pruning devDependencies
remote:        removed 88 packages and audited 36 packages in 2.161s
remote:        
remote:        2 packages are looking for funding
remote:          run `npm fund` for details
remote:        
remote:        found 0 vulnerabilities
remote:        
remote:        
remote: -----> Build succeeded!
remote:  !     This app may not specify any way to start a node process
remote:        https://devcenter.heroku.com/articles/nodejs-support#default-web-process-type
remote: 
remote: -----> Discovering process types
remote:        Procfile declares types     -> (none)
remote:        Default types for buildpack -> web
remote: 
remote: -----> Compressing...
remote:        Done: 36.2M
remote: -----> Launching...
remote:        Released v7
remote:        https://getexpressvn.herokuapp.com/ deployed to Heroku
remote: 
remote: Verifying deploy... done.

please help! thank you

Did you ever manage to solve this? I’m also getting this error and cannot figure it out.