Fixed now_helper for sqlite (time is missing)

[jlesage]

The sqlite date('now') function returns only the current time.

# echo "SELECT date('now')"|sqlite3
2020-08-06

To be comparable to the NOW() function of mysql, the date and time should be returned. The datetime('now','localtime') function of sqlite does this:

# echo "SELECT datetime('now','localtime')"|sqlite3
2020-08-06 16:44:59

Which is the same thing as mysql:

# echo "SELECT NOW()"| mysql
NOW()
2020-08-06 16:44:59

[jc21]

Docker Image for build 1 is available on DockerHub as jc21/nginx-proxy-manager:github-pr-544