Add Jenkinsfile and deploy script (build on NAS checkout, compose up -d).

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

scripts/deploy.sh

@@ -0,0 +1,38 @@
+#!/bin/sh
+# Rebuild the app image from the current checkout and bring the stack up.
+# Run from anywhere; used by the Jenkins Deploy stage and for manual deploys.
+set -eu
+
+cd "$(dirname "$0")/.."
+
+HEALTH_TIMEOUT="${HEALTH_TIMEOUT:-180}"
+
+echo "deploy: $(git log -1 --format='%h %s' 2>/dev/null || echo unknown)"
+
+docker compose config -q
+docker compose build app
+docker compose up -d
+
+# registry's healthcheck always passes, so the app health is what tells us the deploy worked.
+cid="$(docker compose ps -q app)"
+elapsed=0
+while :; do
+  status="$(docker inspect -f '{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}' "$cid")"
+  case "$status" in
+    healthy) break ;;
+    unhealthy|exited|dead)
+      echo "deploy: app is $status" >&2
+      docker compose logs --tail 50 app >&2
+      exit 1 ;;
+  esac
+  if [ "$elapsed" -ge "$HEALTH_TIMEOUT" ]; then
+    echo "deploy: app not healthy after ${HEALTH_TIMEOUT}s (status: $status)" >&2
+    docker compose logs --tail 50 app >&2
+    exit 1
+  fi
+  sleep 5
+  elapsed=$((elapsed + 5))
+done
+
+docker compose ps
+echo "deploy: done"