Upgrade Alpine to 3.15

[mikekuzak]

The current image has a lot of CVEs

haugene/transmission-openvpn:3.7.1 (alpine 3.13.6)
==================================================
Total: 28 (HIGH: 26, CRITICAL: 2)

[edgd1er]

alpine is only used at build time. ubuntu is the distribution used at runtime:

docker-transmission-openvpn/Dockerfile

Line 19 in 20877f1

FROM ubuntu:20.04

[pkishino]

This, we have deprecated alpine (was used pre-4.0 release) and those are no longer maintained

[mikekuzak]

So with the move to ubuntu Transmission has been downgraded from 3.0.0 to 2.9.4 Any reason for this move ?

[pkishino]

Yes, please see the main 4.0 release thread

[mikekuzak]

This looks ok, thanks

haugene/transmission-openvpn:4.0 (ubuntu 20.04)
===============================================
Total: 0 (HIGH: 0, CRITICAL: 0)

ghcr.io/linuxserver/swag:latest
2021-12-30T12:09:23.524Z	�[34mINFO�[0m	Number of language-specific files: 1
2021-12-30T12:09:23.525Z	�[34mINFO�[0m	Detecting python-pkg vulnerabilities...