fix(gitignore): make api ignore pattern root-specific

fix(test): add missing os import to test files
chore(deps): update dependencies from go mod tidy

cmd/api/handlers_test.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"strings"
+	"os"
 	"testing"
 
 	"github.com/go-redis/redis/v8"