ops: add production observability and recovery

infra/frontend-prod.Dockerfile

@@ -0,0 +1,12 @@
+FROM node:22-slim AS build
+
+WORKDIR /app
+RUN corepack enable && corepack prepare pnpm@11.9.0 --activate
+COPY frontend/package.json frontend/pnpm-lock.yaml frontend/pnpm-workspace.yaml ./
+RUN pnpm install --frozen-lockfile
+COPY frontend ./
+RUN pnpm build
+
+FROM nginx:1.27-alpine
+COPY infra/nginx.conf /etc/nginx/conf.d/default.conf
+COPY --from=build /app/dist /usr/share/nginx/html