Add deploy.sh to redeploy the stack on the server

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

deploy.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+# Redeploy Ledgerline on the server: pull the latest code and (re)start the
+# stack behind Traefik. Run from your own machine:
+#
+#   ./deploy.sh
+#
+# Override the target with env vars, e.g. DEPLOY_HOST=other ./deploy.sh
+set -euo pipefail
+
+DEPLOY_HOST="${DEPLOY_HOST:-czy}"
+DEPLOY_DIR="${DEPLOY_DIR:-/opt/apps/LedgerLine}"
+
+# Always both files: the base file alone would publish every service port.
+COMPOSE="docker compose -f docker-compose.yml -f docker-compose.traefik.yml"
+
+# The server pulls from the remote, so unpushed commits would not be deployed.
+if [ -n "$(git log '@{u}..HEAD' --oneline 2>/dev/null)" ]; then
+  echo "warning: local commits are not pushed; the server will not see them" >&2
+fi
+
+ssh "$DEPLOY_HOST" "cd '$DEPLOY_DIR' && git pull --ff-only && $COMPOSE up -d --build && $COMPOSE ps"