Initial commit: Quiet Thanks gratitude app

A calm, private gratitude and mood log built with Next.js 16, TypeScript,
Tailwind CSS, and SQLite/Drizzle ORM.

Features:
- Quick check-in with autosave (800ms debounce)
- Optional mood selector (5 levels) with accessibility labels
- Optional tags with tap-to-add from recent
- Timeline with weekly reflection card
- Filters by mood, tag, and rough day
- Export to Markdown and JSON
- Dark mode default
- Delete with undo toast
- Docker deployment ready

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

Dockerfile

@@ -0,0 +1,57 @@
+# Build stage
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# Install build dependencies for native modules (better-sqlite3)
+RUN apk add --no-cache python3 make g++
+
+# Install dependencies (skip postinstall as source isn't there yet)
+COPY package*.json ./
+RUN npm ci --ignore-scripts
+
+# Rebuild better-sqlite3 native bindings
+RUN npm rebuild better-sqlite3
+
+# Copy source files
+COPY . .
+
+# Generate database migrations and run them
+RUN npx drizzle-kit generate || true
+RUN npm run db:migrate || true
+
+# Build the application
+RUN npm run build
+
+# Production stage
+FROM node:20-alpine AS runner
+
+WORKDIR /app
+
+ENV NODE_ENV=production
+ENV DATABASE_PATH=/app/data/quietthanks.db
+
+# Create non-root user
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 nextjs
+
+# Copy built application
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/.next/standalone ./
+COPY --from=builder /app/.next/static ./.next/static
+COPY --from=builder /app/drizzle ./drizzle
+COPY --from=builder /app/src/lib/db/migrate.ts ./src/lib/db/migrate.ts
+COPY --from=builder /app/src/lib/db/schema.ts ./src/lib/db/schema.ts
+COPY --from=builder /app/node_modules ./node_modules
+
+# Create data directory
+RUN mkdir -p /app/data && chown -R nextjs:nodejs /app/data
+
+USER nextjs
+
+EXPOSE 3000
+
+ENV PORT=3000
+ENV HOSTNAME="0.0.0.0"
+
+CMD ["node", "server.js"]