Add configuration file and update server settings

- Introduced a new `config.yaml` file for managing server, database, cache, queue, AI, scraping, logging, and rate limiting configurations.
- Updated `docker-compose.yml` to reflect the new server port (8081) and adjusted health check endpoints accordingly.
- Modified `Dockerfile` to expose the new server port.
- Updated `README.md` to reflect changes in server configuration and added documentation for the new configuration structure.
- Added test scripts for server and Swagger documentation testing.
- Refactored customer domain structure to align with new configuration settings and improve maintainability.

test_server.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+echo "Testing Tender Management API Server..."
+
+# Check if MongoDB is running
+if ! pgrep -x "mongod" > /dev/null; then
+    echo "Warning: MongoDB is not running. Starting server may fail."
+    echo "To start MongoDB: sudo systemctl start mongod"
+fi
+
+# Build the server
+echo "Building server..."
+go build -o bin/web ./cmd/web
+
+if [ $? -ne 0 ]; then
+    echo "Build failed!"
+    exit 1
+fi
+
+echo "Build successful!"
+
+# Test the health endpoint (if server starts)
+echo "Testing health endpoint..."
+timeout 5s curl -s http://localhost:8081/health || echo "Server not responding (expected if MongoDB is not running)"
+
+echo "Test completed!"