Update Dockerfile for BLAST 2.15.0

[nathanweeks]

SequenceServer 3.0.1 supports BLAST 2.15.0, though the Dockerfile currently specifies 2.14.0:

sequenceserver/Dockerfile

Line 3 in 7233794

ARG BLAST_VERSION=2.14.0

This PR proposes updating the Dockerfile for BLAST 2.15.0, with several other ancillary modifications:

• Facilitate arm64 container builds by using ncbi/blast-static (which has linux/arm64 images)
• Use ruby "bookworm" base images instead of "bullseye" to fix resulting GLIBCXX_<version> not found errors
• While devops best practices generally involve pinning dependencies as precisely as possible for reproducibility, suggest not pinning ruby patch version (i.e., (ruby:3.2 instead of ruby:3.2.<patch>) so newer/patched versions are more easily/likely used during development & production builds
• Update node base image from (EOL) version 15 to (LTS) version 20.
• Explicitly specify container registry for build environments where docker.io is not the default

[tadast]

Looks great, thanks @nathanweeks 🙌