I'm doing the deployment using vscode. (Note link.)
This is an error from docker.
2021-01-20T05:35:31.212395041Z PATH="$PATH:/home/site/wwwroot" npm run start
2021-01-20T05:35:39.520951643Z npm info it worked if it ends with ok
2021-01-20T05:35:39.520982444Z npm info using npm@6.14.8
2021-01-20T05:35:39.520988045Z npm info using node@Vignesh .23.0
2021-01-20T05:35:42.386615188Z npm ERR! code ENOENT
2021-01-20T05:35:42.387700330Z npm ERR! syscall open
2021-01-20T05:35:42.389260491Z npm ERR! path /home/site/wwwroot/package.json
2021-01-20T05:35:42.396410869Z npm ERR! errno -2
2021-01-20T05:35:42.420288698Z npm ERR! enoent ENOENT: no such file or directory, open '/home/site/wwwroot/package.json'
2021-01-20T05:35:42.441018205Z npm ERR! enoent This is related to npm not being able to find a file.
2021-01-20T05:35:42.457611451Z npm ERR! enoent
2021-01-20T05:35:42.719128931Z npm timing npm Completed in 4978ms
2021-01-20T05:35:42.721015004Z
2021-01-20T05:35:42.728038577Z npm ERR! A complete log of this run can be found in:
2021-01-20T05:35:42.729341828Z npm ERR! /root/.npm/_logs/2021-01-20T05_35_42_465Z-debug.log
It looks like an error that appears after a build failure.