Changed previous 'var's to 'const's
Changed previous 'var's to 'const's

metrics.js
- Removed the 'var' variables I had made, to 'const' so that these variables can't be changed, to improve security
shankari/e-mission-phone,shankari/e-mission-phone,e-mission/e-mission-phone,shankari/e-mission-phone,e-mission/e-mission-phone,e-mission/e-mission-phone,shankari/e-mission-phone,e-mission/e-mission-phone