docs: mark project as preview, AI-assisted, untested

README.md

@@ -1,4 +1,50 @@
 # go-store-scraper-bot
-~~[Store Scraper Bot](https://github.com/tiennm99/store-scraper-bot) but written in Go. Just for education purpose~~
 
-I will rewrite on the branch `feature/go` in original repo. And will replace the java version when it's stable. Check the original repo for more detail.
+Go port of [store-scraper-bot](https://github.com/tiennm99/store-scraper-bot).
+
+> ⚠️ **Preview / unstable — use at your own risk.**
+> This port was produced largely with AI assistance and has **not** been tested
+> end-to-end against a live Telegram bot or the upstream Java implementation.
+> Behavior parity is intended but unverified. Expect bugs, schema mismatches,
+> or runtime failures. Do not run against a production database.
+
+The Java version remains the reference implementation. This Go version is
+under development; the plan is to replace the Java version on the original
+repo's `feature/go` branch once it stabilizes.
+
+## Status
+
+- Builds cleanly (`go build ./...`, `go vet ./...`).
+- Mongo schema is intended to match Java (collections: `common`, `group`,
+  `apple_app`, `google_app`; string `_id`; `class` discriminator field).
+- Telegram command identifiers match Java exactly (`/info`, `/addgroup`,
+  `/delgroup`, `/listgroup`, `/addapple`, `/delapple`, `/addgoogle`,
+  `/delgoogle`, `/listapp`, `/checkapp`, `/checkappscore`, `/rawappleapp`,
+  `/rawgoogleapp`).
+- HTML parse mode; weekend-silent daily report; 10-minute API cache.
+
+## Configuration
+
+Required env vars (see `.env.example`):
+
+| Name | Notes |
+|---|---|
+| `TELEGRAM_BOT_TOKEN` | Telegram bot token |
+| `TELEGRAM_BOT_USERNAME` | Bot username |
+| `MONGODB_CONNECTION_STRING` | Preferred (Java parity); falls back to `MONGO_URI` |
+| `ADMIN_IDS` | Comma-separated Telegram user IDs |
+| `ENV` | `DEVELOPMENT` or `PRODUCTION` |
+| `SOURCE_COMMIT` | Optional; shown on startup |
+
+## Run
+
+```sh
+go build -o bot ./cmd/bot
+./bot
+```
+
+Or via Docker Compose:
+
+```sh
+docker compose up --build
+```