Initial commit: DrinkTracker full-stack app

Next.js 14 drink collection tracker with AI-powered search,
menu scanning, ratings, wishlist, sharing, and CSV backup/restore.

Features:
- Auth (credentials + OAuth ready)
- Drink collection with ratings and reviews
- AI search via Claude/OpenAI with search history
- Menu photo scanning with AI extraction
- Wishlist / Try Later system
- Public sharing via slug URLs
- CSV backup and restore (merge/replace modes)
- Docker Compose for Postgres + MinIO + dev server

Security: docker-compose files use env var interpolation
instead of hardcoded secrets.

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

.env.example

@@ -0,0 +1,26 @@
+# Database
+DATABASE_URL="postgresql://drinktracker:YOUR_PASSWORD@localhost:5432/drinktracker"
+POSTGRES_USER="drinktracker"
+POSTGRES_PASSWORD="YOUR_PASSWORD"
+POSTGRES_DB="drinktracker"
+
+# NextAuth
+NEXTAUTH_URL="http://localhost:3000"
+NEXTAUTH_SECRET="generate-with: openssl rand -base64 32"
+
+# OAuth Providers
+GOOGLE_CLIENT_ID=""
+GOOGLE_CLIENT_SECRET=""
+GITHUB_CLIENT_ID=""
+GITHUB_CLIENT_SECRET=""
+
+# MinIO / S3-compatible storage
+MINIO_ENDPOINT="localhost"
+MINIO_PORT="9000"
+MINIO_ACCESS_KEY="generate-a-strong-access-key"
+MINIO_SECRET_KEY="generate-a-strong-secret-key"
+MINIO_BUCKET="drink-images"
+MINIO_USE_SSL="false"
+
+# Encryption (for API key storage)
+ENCRYPTION_KEY="generate-with: openssl rand -hex 32"