S6-overlay: updated to latest version 1.22.1.0

2.6.2

S6-overlay: updated to latest version 1.22.1.0 (#40)

2.6.1: Dockerfile: S6 updated, duplication removed (#36)

Changed

• S6 updated to v1.21.7.0
• S6 verified via automatic gpg signature, instead of manually-generated sha256
• S6 and Goss installed from dedicated scripts, removed obvious Dockerfile duplication

Variants

• Ubuntu 17.10 removed, Canonical pulled support July 2018

Dockerfile: using/abusing multistage to save space

As a base image consumer, tighter packaging for this shared container will save storage space, container pull times, and a small amount of CPU processing to reassemble the layers.

Alpine: upgraded from 3.8 --> 3.9

Changes:

Alpine OS - 3.8 --> 3.9
Ubuntu: no changes

Goss / S6: added sha256 verification

Changed

• S6: v1.21.7.0
• Goss: v0.3.6

Added

• sha256 verification of S6 and Goss packages at build time

Alpine: upgraded variant from ~3.7 --> ~3.8

Changes:

• Alpine OS - 3.7 --> 3.8
• Ubuntu: no changes

S6: updated to v1.21.4.0

Updated:

• S6: 1.21.4.0

New Variant: Ubuntu 18.04

New:

• Added next LTS variant of Ubuntu (18.04)

New Variant: Ubuntu 17.10

New:

• Added non-LTS variant of Ubuntu for enthusiasts

Alpine: updated to 3.7

Changed:

• Alpine-only: updated to 3.7