Update README

README.md

@@ -1,11 +1,131 @@
 # COOPGO Solidarity Transport
 
-COOPGO Solidarity Transport is a solidarity transport management microservice. It handles :
+A microservice for managing solidarity transport, enabling volunteer drivers to provide rides to passengers in need. Part of the COOPGO cooperative mobility platform.
 
-- driver availabilities declarations
-- passenger journeys requests
-- matching between passenger journeys requests and driver availabilities
+## Features
 
-## TO DO
+- **Driver Availability Management**: Drivers can declare their regular weekly availability slots
+- **Journey Matching**: Automatically matches passenger journey requests with available drivers based on time and location
+- **Booking System**: Full booking lifecycle management with status tracking
+- **Route Calculation**: Integration with Valhalla routing service for distance and duration calculations
+- **Round-trip Support**: Handles both one-way and return journeys with the "noreturn" toggle
 
-- Save passenger trip requests
+## Architecture
+
+### Components
+
+```
+├── handler/          # Business logic layer
+├── servers/grpc/     # GRPC API server
+│   ├── proto/        # Protocol buffer definitions
+│   ├── server/       # GRPC service implementations
+│   └── transformers/ # Type converters (proto <-> internal types)
+├── storage/          # Data persistence layer (MongoDB, Memory, Mock)
+└── types/            # Domain types
+```
+
+### Dependencies
+
+- **Routing Service**: Valhalla-based routing for journey calculations
+- **Storage**: MongoDB (default), in-memory, or mock storage
+- **GRPC**: Service communication protocol
+
+## Configuration
+
+Configuration is managed via Viper. Create a `config.yaml` file or use environment variables (with `_` as separator).
+
+### Default Configuration
+
+```yaml
+name: "COOPGO Solidarity Transport"
+dev_env: false
+
+storage:
+  db:
+    type: mongodb
+    mongodb:
+      host: localhost
+      port: 27017
+      db_name: coopgo_platform
+      collections:
+        drivers_regular_availabilities: solidarity_drivers_regular_availabilities
+        bookings: solidarity_bookings
+        driver_journeys: solidarity_driver_journeys
+
+services:
+  grpc:
+    enable: true
+    port: 8080
+
+routing:
+  type: valhalla
+  valhalla:
+    base_url: https://valhalla.coopgo.io
+
+parameters:
+  limits:
+    distance:
+      min: 4    # Minimum journey distance (km)
+      max: 200  # Maximum journey distance (km)
+```
+
+## Building
+
+```bash
+go build
+```
+
+### Docker
+
+```bash
+docker build -t solidarity-transport \
+  --build-arg ACCESS_TOKEN_USR=<git_username> \
+  --build-arg ACCESS_TOKEN_PWD=<git_token> .
+```
+
+## Running
+
+```bash
+./solidarity-transport
+```
+
+The GRPC server starts on port 8080 by default.
+
+## GRPC API
+
+### Driver Availabilities
+
+| Method | Description |
+|--------|-------------|
+| `AddDriverRegularAvailability` | Add a single availability slot |
+| `AddDriverRegularAvailabilities` | Add multiple availability slots |
+| `GetDriverRegularAvailabilities` | Get all availabilities for a driver |
+| `DeleteDriverRegularAvailability` | Remove an availability slot |
+
+### Driver Journeys
+
+| Method | Description |
+|--------|-------------|
+| `GetDriverJourneys` | Search for available driver journeys matching a route and date |
+| `GetDriverJourney` | Get details of a specific journey |
+| `ToggleSolidarityTransportNoreturn` | Toggle round-trip/one-way mode for a journey |
+
+### Bookings
+
+| Method | Description |
+|--------|-------------|
+| `BookDriverJourney` | Create a booking for a journey |
+| `GetSolidarityTransportBookings` | List bookings (supports status filtering) |
+| `GetSolidarityTransportBooking` | Get a specific booking |
+| `UpdateSolidarityTransportBooking` | Update booking details |
+| `UpdateSolidarityTransportBookingStatus` | Update booking status |
+
+## Testing
+
+```bash
+go test ./...
+```
+
+## License
+
+COOPGO