docs: add swagger in README.md file

Author: anqorithm

README.md

@@ -86,6 +86,10 @@ NAQA API is a RESTful service designed to provide data about the purification pr
 
 [Access the API on GCP](https://naqa-api-36462279645.europe-west1.run.app/)
 
+### API Documentation
+
+[Swagger Documentation](https://naqa-api-36462279645.europe-west1.run.app/docs/index.html) - Interactive API documentation
+
 ### Prerequisites
 - Go 1.23.4 or higher
 - Git
@@ -196,6 +200,8 @@ Server will start at `http://localhost:3000`
 - Response Time: 195ms
 - Open Connections: 7.8 MB
 
+![Additional Performance View](./assets/3.png)
+
 <details>
 <summary>Monitoring Features</summary>
 

assets/3.png

@@ -92,13 +92,11 @@ func TestGetDaysInYear(t *testing.T) {
 	}
 
 
-	for _, tt := range te
-	
+	for _, tt := range tests {
 		result := handlers.GetDaysInYear(tt.year)
-			if result != tt.expected {
-				t.Errorf("getDaysInYear(%d) = %d, expected %d", tt.year, result, tt.expected)
-			}
-		})
+		if result != tt.expected {
+			t.Errorf("getDaysInYear(%d) = %d, expected %d", tt.year, result, tt.expected)
+		}
 	}
 }