chore: add Docker deployment files, README, and Prisma migrations

- Add Dockerfile and docker-compose.yml for VPS/LXC deployment.
- Update README with setup, environment variables, and deployment notes.
- Commit initial Prisma migration for SQLite schema.
- Configure Next.js for standalone output and dev origin allowlist.

Dockerfile

@@ -0,0 +1,40 @@
+FROM node:22-alpine AS base
+
+FROM base AS deps
+RUN apk add --no-cache libc6-compat
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+
+FROM base AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+ENV NEXT_TELEMETRY_DISABLED=1
+RUN npx prisma generate
+RUN npm run build
+
+FROM base AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+ENV NEXT_TELEMETRY_DISABLED=1
+
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 nextjs
+
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/.next/standalone ./
+COPY --from=builder /app/.next/static ./.next/static
+COPY --from=builder /app/prisma ./prisma
+COPY --from=builder /app/node_modules/.bin/prisma ./node_modules/.bin/prisma
+COPY --from=builder /app/node_modules/@prisma ./node_modules/@prisma
+
+RUN mkdir -p /app/data && chown nextjs:nodejs /app/data
+
+USER nextjs
+
+EXPOSE 3000
+ENV PORT=3000
+ENV HOSTNAME="0.0.0.0"
+
+CMD ["node", "server.js"]