Root cause:
- prometheus metrics '/metrics/codimd' exported by 3ca0341 are still in 'routes need sessions' section.
- prometheus scrapes metrics repeatedly.
- new session created every time while prometheus scrapes metrics '/metrics/codimd'.
Solution:
- move /metrics/codimd from lib/routes.js to lib/metrics.js.
- move /metrics/codimd from section 'routes need sessions' of app.js to 'routes without sessions'.
Signed-off-by: tarlety <tarlety@gmail.com>
tarlety