added docker setup

frontend/Dockerfile

@@ -0,0 +1,31 @@
+# Build stage
+FROM node:20-alpine as build
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install all dependencies (including devDependencies for build)
+RUN npm ci
+
+# Copy source code
+COPY . .
+
+# Build the application
+RUN npm run build
+
+# Production stage
+FROM nginx:alpine
+
+# Copy built files from build stage
+COPY --from=build /app/dist /usr/share/nginx/html
+
+# Copy custom nginx configuration for SPA
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+# Expose port
+EXPOSE 80
+
+# Start nginx
+CMD ["nginx", "-g", "daemon off;"]