Update openssl to 1.1.1 series (if not already)

[lowenna]

Looks like 1.0.2 is coming to end of support. Should (if not already) consider upgrading to the 1.1.1 series.

https://www.openssl.org/source/

Note: The latest stable version is the 1.1.1 series. This is also our Long Term Support (LTS) version, supported until 11th September 2023. Our previous LTS version (1.0.2 series) will continue to be supported until 31st December 2019 (security fixes only during the last year of support)

[justincormack]

This will be fixed by updating the Alpine base image (may make sense to wait for the imminent release).