feat(docker): Deploy frontend from express

Dockerfile

@@ -0,0 +1,29 @@
+# --- Build frontend ---
+FROM node:24-slim AS frontend-builder
+WORKDIR /frontend
+COPY frontend/package*.json ./
+RUN npm install
+COPY frontend/ .
+RUN npm run build
+
+# --- Backend setup ---
+FROM node:24-slim
+
+# Install ping for backend
+RUN apt-get update && \
+    apt-get install -y iputils-ping && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Copy backend code
+COPY backend/package*.json ./
+RUN npm install
+COPY backend/ .
+
+# Copy built frontend into backend expected location
+COPY --from=frontend-builder /frontend/dist /frontend/dist
+
+EXPOSE 5000
+
+CMD ["node", "index.js"]