How to run npm scripts concurrently?
Briefly

To avoid manually calling each script you can define a new script in the package.json. first && second in bash means: when the first returns success then run the second one. If fails, stop the execution and return this fail value.
Now ci:check will start each check concurrently. The total execution time will be the longest-running script, rather than the sum of all three.
first & second will run both commands at the same moment, but the result will be the second one's outcome. If the first fails, the final result will be positive.
However, this approach runs all checks simultaneously but reports the exit status of the last command, similar to a sequential execution.
Read at DEV Community
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