added dockerfile for docs

apps/docs/.dockerignore

@@ -0,0 +1,2 @@
+node_modules
+dist

apps/docs/Dockerfile

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+# --- Build stage ---
+FROM node:24-alpine3.21 AS builder
+# Consider using the latest patch version for security updates
+RUN apk update && apk upgrade
+
+# Install pnpm
+RUN corepack enable && corepack prepare pnpm@latest --activate
+RUN apk add --no-cache git
+
+# Set workdir
+WORKDIR /app
+
+# Copy project files
+COPY ./apps/docs .
+
+# Install dependencies
+RUN pnpm install
+
+# Build VitePress site
+RUN pnpm build
+
+# --- Serve stage ---
+FROM nginx:alpine
+
+# Copy built site to nginx public folder
+COPY --from=builder /app/.vitepress/dist /usr/share/nginx/html
+
+# Expose port
+EXPOSE 80
+
+# Start nginx
+CMD ["nginx", "-g", "daemon off;"]