flatten app to repo root and update docker deployment for single-stack runtime

Dockerfile

@@ -0,0 +1,40 @@
+FROM node:20-alpine AS base
+
+WORKDIR /app
+
+FROM base AS deps
+COPY package.json package-lock.json ./
+RUN npm ci
+
+FROM base AS builder
+ARG NEXT_PUBLIC_API_URL=
+ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
+ENV NEXT_TELEMETRY_DISABLED=1
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+RUN mkdir -p public && npm run build
+
+FROM base AS runner
+WORKDIR /app
+
+ENV NODE_ENV=production
+ARG NEXT_PUBLIC_API_URL=
+ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
+ENV NEXT_TELEMETRY_DISABLED=1
+
+RUN apk add --no-cache su-exec
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 nextjs
+
+COPY --from=builder /app/public ./public
+COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+COPY docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh
+RUN chmod +x /usr/local/bin/docker-entrypoint.sh
+
+EXPOSE 3000
+
+ENV PORT=3000
+
+ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]
+CMD ["node", "server.js"]