Add monitor config (#3959)
Add monitor config (#3959)

* Add monitor local config

* Fix grammar mistakes

* Apply suggestions from code review

Co-authored-by: Lilian Lee <c684465c17314189c18707959627e2ec4fdec2d0@pingcap.com>
Co-authored-by: SIGSEGV <46500d655f5410ba7d8b9ea80b60e8a997057751@gmail.com>

* Edit capitalization

* Apply suggestions from code review

Co-authored-by: Lilian Lee <c684465c17314189c18707959627e2ec4fdec2d0@pingcap.com>

* Update wording

Co-authored-by: Lilian Lee <c684465c17314189c18707959627e2ec4fdec2d0@pingcap.com>
Co-authored-by: SIGSEGV <46500d655f5410ba7d8b9ea80b60e8a997057751@gmail.com>
pingcap/docs,pingcap/docs,pingcap/docs