Add SQLite visitor IP logging to /server_storage

Log visitor IPs and paths to a local SQLite database via the existing
analytics API route, persisted at /server_storage/visitors.db in Docker
(falls back to ./visitors.db in dev).

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

Dockerfile

@@ -3,7 +3,7 @@ FROM node:20-alpine AS base
 # Install dependencies only when needed
 FROM base AS deps
 # Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
-RUN apk add --no-cache libc6-compat
+RUN apk add --no-cache libc6-compat python3 make g++
 WORKDIR /app
 
 # Install dependencies based on the preferred package manager
@@ -35,6 +35,9 @@ RUN adduser --system --uid 1001 nextjs
 
 COPY --from=builder /app/public ./public
 
+# Create server_storage directory for SQLite DB
+RUN mkdir -p /server_storage && chown nextjs:nodejs /server_storage
+
 # Set the correct permission for prerender cache
 RUN mkdir .next
 RUN chown nextjs:nodejs .next