Add Docker support with multi-stage Vite build and nginx serving

Co-authored-by: Cursor <cursoragent@cursor.com>

Dockerfile

@@ -0,0 +1,31 @@
+# FunZone Accounting Frontend Dockerfile
+FROM node:18-alpine AS build
+
+WORKDIR /app
+
+ARG VITE_API_BASE_URL=http://localhost:8001/api
+ARG VITE_ACCOUNTING_BASE_URL=http://localhost:8010/api
+ARG VITE_BASE_PATH=/
+ENV VITE_API_BASE_URL=$VITE_API_BASE_URL
+ENV VITE_ACCOUNTING_BASE_URL=$VITE_ACCOUNTING_BASE_URL
+ENV VITE_BASE_PATH=$VITE_BASE_PATH
+
+COPY package*.json ./
+RUN npm ci
+
+COPY . .
+RUN npm run build
+
+FROM nginx:alpine
+
+RUN apk add --no-cache curl
+
+COPY --from=build /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost/health || exit 1
+
+CMD ["nginx", "-g", "daemon off;"]