feat: add Docker Compose setup with Dockerfiles for all services

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/web/Dockerfile

@@ -0,0 +1,17 @@
+FROM node:20-alpine AS build
+RUN corepack enable && corepack prepare pnpm@latest --activate
+WORKDIR /app
+
+COPY pnpm-lock.yaml pnpm-workspace.yaml package.json ./
+COPY packages/web/package.json packages/web/
+RUN pnpm install --frozen-lockfile --filter @agent-fox/web...
+
+COPY packages/web/ packages/web/
+COPY tsconfig.base.json ./
+RUN pnpm --filter @agent-fox/web build
+
+FROM nginx:alpine
+COPY --from=build /app/packages/web/dist /usr/share/nginx/html
+COPY packages/web/nginx.conf /etc/nginx/conf.d/default.conf
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]