feat: rename keep-notes to memento-note, migrate to PostgreSQL, fix MCP bugs

- Rename directory keep-notes -> memento-note with all code references
- Prisma: SQLite -> PostgreSQL (both app and MCP server schemas)
- Sync MCP schema with main app (add missing fields, relations, indexes)
- Delete 17 SQLite migrations (clean slate for PostgreSQL)
- Remove SQLite dependencies (@libsql/client, better-sqlite3, etc.)
- Fix MCP server: hardcoded Windows DB paths -> DATABASE_URL env var
- Fix MCP server: .dockerignore excluded index-sse.js (SSE mode broken)
- MCP Dockerfile: node:20 -> node:22
- Docker Compose: add postgres service, remove SQLite volume
- Generate favicon.ico, icon-192.png, icon-512.png, apple-icon.png
- Update layout.tsx icons and manifest.json for PNG icons
- Update all .env files for PostgreSQL
- Rewrite README.md with updated sections
- Remove mcp-server/node_modules and prisma/client-generated from git tracking

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

memento-note/Dockerfile

@@ -0,0 +1,64 @@
+# Multi-stage build for Next.js 16 with Webpack + Prisma
+# Using Debian 11 (bullseye) for native OpenSSL 1.1.x support
+
+FROM node:22-bullseye-slim AS base
+
+FROM base AS deps
+WORKDIR /app
+
+# Install OpenSSL (1.1.x native in Debian 11)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    openssl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install dependencies
+COPY package.json package-lock.json* ./
+RUN npm install --legacy-peer-deps
+
+FROM base AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+
+# Copy Prisma schema and generate client BEFORE Next.js build
+COPY prisma ./prisma
+RUN npx prisma generate
+
+# Build Next.js with Webpack
+ENV NEXT_TELEMETRY_DISABLED=1
+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/package.json ./package.json
+COPY --from=builder /app/package-lock.json ./package-lock.json
+
+RUN mkdir .next
+RUN chown nextjs:nodejs .next
+
+# Copy Next.js standalone output
+COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+
+# Copy Prisma schema, generated client, and Query Engine binaries
+COPY --from=builder /app/prisma ./prisma
+RUN chown -R nextjs:nodejs /app/prisma
+COPY --from=builder --chown=nextjs:nodejs /app/node_modules/.prisma ./node_modules/.prisma
+COPY --from=builder --chown=nextjs:nodejs /app/node_modules ./node_modules
+
+USER nextjs
+
+EXPOSE 3000
+
+ENV PORT=3000
+ENV HOSTNAME="0.0.0.0"
+
+CMD ["node", "server.js"]