starts cmd prompt, runs cmd, and remains open

file-to-start-cmd-prompt-and-remain-open.txt

Put in your batch file

start cmd.exe /k "net use"
From cmd /?

Starts a new instance of the Windows XP command interpreter

CMD [/A | /U] [/Q] [/D] [/E:ON | /E:OFF] [/F:ON | /F:OFF] [/V:ON | /V:OFF] [[/S] [/C | /K] string]

/C Carries out the command specified by string and then terminates
/K Carries out the command specified by string but remains

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FOR EXAMPLE, create a file `start-server.cmd` that you can click on from File Explorer;
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REM npx json-server --help or -h
REM  --watch, -w 
REM --port, -p
start cmd.exe /k "npx json-server -p 4000 --watch db.json"
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