Rebuild: a proper deployment for voyager 2

Dockerfile with two targets: app (compiled AdonisJS, production
dependencies, Node 24.16 as in CI) and edge (the Rust worker, cargo
caches as build mounts). deploy/compose.yaml, project usenet-rebuild:
postgres (data on the HDD, catalog tablespace on the NVMe), migrate,
web, coordinator, edge; edge-ts and ace behind profiles.
deploy/deploy.sh (~/bin/deploy-usenet-rebuild on homelab): fetches the
commit (must be on rebuild), builds, migrates, recreates web,
coordinator and edge (the worker stopped first), never postgres.

CI deploys a push to rebuild that passes: the deploy key's forced
command passes "deploy-rebuild <sha>" on. A push to master no longer
deploys from this branch's workflow. deploy/README.md.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.dockerignore

@@ -0,0 +1,6 @@
+node_modules
+build
+tmp
+.env
+.git
+tools/edge-bench-rs/target