ci: add woodpecker pipeline, Dockerfile and deploy configs

Mirrors the oneos- project layout: multi-stage node:22 → nginx:alpine
build, Woodpecker pipeline that tags images as <branch>-<pkg-version>
and pushes to harbor.lnh2e.com/lingniu-v1/bi, and a swarm-style
docker-compose for deployment.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -0,0 +1,15 @@
+FROM node:22-alpine AS builder
+
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+FROM nginx:alpine
+
+COPY --from=builder /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]