feat: add Woodpecker CI + Gitea deployment templates

- .woodpecker.yml: full pipeline template (install → lint-fix → lint → test → deploy)
- scripts/setup-project.sh: one-command VPS setup (user, dir, deploy, sudoers, systemd, nginx)
- scripts/deploy.sh: deploy script template (rsync + npm ci + systemctl + health check)
- scripts/ci-lint-fix.sh: ESLint auto-fix with [CI SKIP] commit-back
- docs/ci-cd.md: complete CI/CD documentation and troubleshooting
- .env.example: added WOODPECKER_TOKEN
- DOCS.md: added CI/CD section

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/ci-lint-fix.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# ci-lint-fix.sh — Run ESLint --fix and commit changes back to Gitea.
+#
+# Used by Woodpecker CI. If ESLint auto-fixes anything, commits with
+# [CI SKIP] to prevent an infinite pipeline loop.
+#
+# Requires GITEA_TOKEN secret in Woodpecker.
+#
+# Customize LINT_TARGETS and REPO_URL for your project.
+
+LINT_TARGETS="."
+GITEA_HOST="${GITEA_HOST:-git.spektr.design}"
+GITEA_ORG="${GITEA_ORG:-gitea}"
+REPO_NAME="${CI_REPO_NAME:-$(basename "$(git rev-parse --show-toplevel)")}"
+
+echo "--- Running ESLint --fix"
+# shellcheck disable=SC2086
+npx eslint --fix ${LINT_TARGETS} || true
+
+if [ -z "$(git diff)" ]; then
+    echo "--- No auto-fixable issues found"
+    exit 0
+fi
+
+echo "--- ESLint auto-fixed issues, committing back..."
+
+git config user.name "Woodpecker CI"
+git config user.email "ci@${GITEA_HOST}"
+
+REPO_URL="https://gitea:${GITEA_TOKEN}@${GITEA_HOST}/${GITEA_ORG}/${REPO_NAME}.git"
+git remote set-url origin "${REPO_URL}"
+
+git add -A
+git commit -m "fix: auto-fix eslint issues [CI SKIP]"
+git push origin HEAD:main
+
+echo "--- Auto-fix committed and pushed"