Write a production-ready function that sums the numbers in a file. The function will receive as input the path to a file. Each line of the file will contain either a number or a path to another file. For each file, output the file path and the sum of the numbers contained both directly in the file or in any of the subfiles listed (or their subfiles, etc).
For example, if file A.txt contains:
3
19
B.txt
50
And file B.txt contains:
C.txt
27
And file C.txt contains:
10
2
The sum of A.txt and its subfiles is 111, sum for B.txt is 39, and sum for C.txt is 12.
Clone the repo then:
npm install && npm start
