Upgrade nginx proxy servers on osgeo3, osgeo4, osgeo7 to Ubuntu 20.04, nginx 1.17+

[robe]

Per ​https://ubuntu.com/security/CVE-2019-20372

we are running version 1.14 of nginx (released with Ubuntu 18.04)

Need to upgrade to more easily mitigate ​https://ubuntu.com/security/CVE-2019-20372.

Will test on osgeo4 first.

[robe]

Done for osgeo4 osgeo4-nginx --

do-release-upgrade
nginx -v #now reads nginx version: nginx/1.18.0 (Ubuntu)

[robe]

Going to start osgeo3, might be a little up and down while doing that.

[robe]

Okay looks like osgeo3-nginx is running debian 10 and though it's running 1.14.2, looks like debian has remediated that release for this CVE ​https://security-tracker.debian.org/tracker/CVE-2019-20372 so not update is required.

I'll take care of osgeo7 this coming weekend.

[robe]

Okay going to start upgrade on osgeo7 nginx

[robe]

Done upgrading osgeo7 nginx container - from Ubuntu 18.04 -> Ubuntu 20.04.3 and from nginx 1.14 to nginx version: nginx/1.18.0 (Ubuntu)