feat(frontend): add React UI — procurement office, wizard, suppliers, inventory panel (dash port), role-based login

frontend/Dockerfile

@@ -0,0 +1,28 @@
+# Frontend image — multi-stage build
+# Stage 1: build the Vite app with Node.js
+# Stage 2: serve static files with nginx (which also proxies /api -> api:8000)
+
+FROM node:22-alpine AS build
+
+WORKDIR /app
+
+# Dependencies first (layer caching)
+# NPM_REGISTRY overridable; default points at npmmirror because
+# registry.npmjs.org is unreachable from this network.
+ARG NPM_REGISTRY=https://registry.npmmirror.com
+COPY package.json package-lock.json ./
+RUN npm config set registry ${NPM_REGISTRY} && npm ci
+
+# Source code + build
+COPY . .
+RUN npm run build
+
+# ---------- runtime ----------
+FROM nginx:alpine
+
+COPY --from=build /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80
+
+CMD ["nginx", "-g", "daemon off;"]