fix: use npm instead of pnpm in Docker for native binding compilation

pnpm's symlink store prevents better-sqlite3 native bindings from
being compiled/found. npm places files directly and compiles native
modules reliably.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -1,13 +1,11 @@
 FROM node:24-alpine
 RUN apk add --no-cache python3 make g++
 WORKDIR /app
-RUN corepack enable pnpm
-COPY package.json pnpm-lock.yaml ./
-RUN pnpm install --frozen-lockfile && pnpm rebuild better-sqlite3
+COPY package.json ./
+RUN npm install
 RUN find node_modules -name "better_sqlite3.node" || (echo "FATAL: binding not found" && exit 1)
 COPY . .
-RUN pnpm run build
-# Keep only build tools cleanup that won't remove sqlite-libs
+RUN npx nuxt build
 RUN apk del make g++ && rm -rf /root/.cache /tmp/*
 RUN mkdir -p /data && chown node:node /data
 USER node