inadvertently omitted from MR 230

- cs man pages
- cs, pt_BR, zh_TW eepsite help
- Add back eepsite_zh.css link that was dropped from zh help pages
- Add link to gan eepsite help that was missing

and clean up removal of mtn files no longer there

OOM seen on one box

previous tunnel fix was incomplete

- Add logo to language picker panel
- Add progress bar to panels

match the SigType selection style, and prep for PQ
add title to default

Dockerfile: migrate to eclipse-temurin:17-alpine base image

instead of package.html and Dummy.java

Correct copy and paste error: jre variant is sufficient for running the app. While I am here: provide qualified image reference to make podman happy

- Since the entire builder is discarded anyway there is no real point in
  uninstalling build-time package dependencies.
- Install ant from official pre-built binaries as well. Make version
  configurable.