Keyword Analysis & Research: add eslint for code quality

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
add eslint for code quality	0.35	0.6	5913	24	27
add	1.71	1	8257	69	3
eslint	0.24	0.7	2451	95	6
for	1.71	0.9	452	40	3
code	0.39	0.1	3736	99	4
quality	1.18	0.7	5194	73	7

Keyword	CPC	PCC	Volume	Score
add eslint for code quality	0.9	0.7	6517	17