Non-root Docker user

Changes:

• Optionally allow docker-nginx to run under a non root user

8.5.0: Nginx: using cont-finish.d for more graceful shutdown (#67)

Changed:

• Inline startup check for nginx syntax. Prevents bad env variable inputs from producing invalid config

Shutdown behavior:

• Used according to newly-clarified + documented shutdown behavior: https://github.com/behance/docker-base#shutdown-behavior, exchanged implementation to /etc/cont-finish.d
• Set drain timeout to 55s, deliberately <60s to account for lack of upstream/downstream timing precision

Base: upgraded from 2.5 --> 2.6

Changed:

https://github.com/behance/docker-base/releases/tag/2.6.0

Base: upgraded from 2.4 --> 2.5

Changed:

• https://github.com/behance/docker-base/releases/tag/2.5.0

SIGUP: ignore terminal disconnect

Changed:

• SIGUP is ignored during a shutdown event, which causes a race condition with SIGTERM.
• Typically only triggered when developing locally...when there is a terminal attached

Base: upgraded to 2.4.X

Changes:

• Alpine: base upgrade solves CVE for remote code execution
• Ubuntu: no notable changes
• Centos: no notable changes

Ubuntu: upgraded base to 18.04

Ubuntu variants:

• base OS 16.04 --> 18.04

Centos:

• no changes

Alpine

• no changes

Dockerfile: updating to latest base

Changes:

• Updated to using behance/docker-base 2.3

Mime support: added, for woff2

Changed:

• Update woff mime-type and define new one for woff2

Dockerfile: updated to parent 2.1

Changes:

• Updated to docker-base v2.1