feat: configuration parameters for minio host, port, timeout;

refactor: renamed buckets;
fix: corrected Host header changing behavior in minio gin endpoint;
feat: function to convert local minio url to /s3/ path url with the backend host

backend/internal/utils/minio.go

@@ -0,0 +1,44 @@
+// Copyright (c) 2025 Nikolai Papin
+//
+// This file is part of Easywish
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package utils
+
+import (
+	"easywish/config"
+	"fmt"
+	"net/url"
+)
+
+func LocalizeS3Url(originalURL string) (string, error) {
+
+	cfg := config.GetConfig()
+	newDomain := fmt.Sprintf("%s:%d", cfg.Hostname, cfg.Port)
+
+	parsedURL, err := url.Parse(originalURL)
+	if err != nil {
+		return "", fmt.Errorf("invalid URL: %w", err)
+	}
+
+	newURL := &url.URL{
+		Scheme: parsedURL.Scheme,
+		Host:   newDomain,
+		Path:   "/s3" + parsedURL.Path,
+		RawQuery: parsedURL.RawQuery,
+	}
+
+	return newURL.String(), nil
+}