ci: add linter

hello/hello.go

@@ -1,9 +1,19 @@
 package hello
 
 import (
+	"fmt"
 	"net/http"
 )
 
-func HelloHandler(w http.ResponseWriter, r *http.Request) {
-	w.Write([]byte("Hello, World!"))
-}
+func Handler(w http.ResponseWriter, _ *http.Request) {
+	_, _ = w.Write([]byte("Hello, World!"))
+
+	if true {
+		if true {
+			if true {
+				fmt.Println("Deeply nested condition")
+
+			}
+		}
+	}
+}