update readme

README.md

@@ -1,5 +1,59 @@
 # Mina Mesh
 
-An implementation of
-[the Coinbase Mesh specification](https://docs.cdp.coinbase.com/mesh/docs/welcome) for the
-[Mina](https://minaprotocol.com/) blockchain.
+[![checks](https://github.com/MinaFoundation/MinaMesh/actions/workflows/checks.yaml/badge.svg)](https://github.com/MinaFoundation/MinaMesh/actions/workflows/checks.yaml)
+
+## Overview
+
+Mina Mesh is an implementation of the [Coinbase Mesh specification](https://docs.cdp.coinbase.com/mesh/docs/welcome) for the [Mina blockchain](https://minaprotocol.com/).
+
+## Building
+
+To build the project:
+
+```bash
+cargo build
+```
+
+The binary will be available at:
+
+```bash
+target/debug/mina_mesh
+```
+
+## Testing
+
+### Setup PostgreSQL with Latest Mainnet Archive DB
+
+To set up the testing environment with a working PostgreSQL database, use the predefined `just` steps:
+
+```bash
+just get-mainnet-archive-db
+just pg
+just wait-for-pg
+```
+
+> Note: This process sets up the environment using the latest mainnet archive database.
+
+### Run Tests
+
+Once the setup is complete, run the tests with:
+
+```bash
+just test
+```
+
+### Managing PostgreSQL
+
+- **Stop PostgreSQL**: To stop the PostgreSQL instance:
+
+  ```bash
+  just pg-down
+  ```
+
+- **Restart PostgreSQL**: To restart without reinitializing the database (useful if the database is already set up):
+
+  ```bash
+  just pg-up
+  ```
+
+> You only need to reinitialize the database if you want the latest data dump.