Minor fixes to README and main file after review

Author: Enrico204

changelog/unreleased/pull-158

@@ -1,8 +1,8 @@
-Bugfix: Use os.TempDir() for temporary directory in default path
+Bugfix: Use platform-specific temporary directory in default path
 
 Instead of using hardcoded value for temporary directory, rest-server now uses
-Go stdlib `os.TempDir()` function, which returns the correct temporary path for
-all platforms.
+Go standard library functions to retrieve the temporary directory path for the
+current platform.
 
 https://github.com/restic/rest-server/issues/157
 https://github.com/restic/rest-server/pull/158

cmd/rest-server/main.go

@@ -27,7 +27,7 @@ var cmdRoot = &cobra.Command{
 }
 
 var server = restserver.Server{
-	Path:   fmt.Sprintf("%s%c%s", os.TempDir(), os.PathSeparator, "restic"),
+	Path:   filepath.Join(os.TempDir(), "restic"),
 	Listen: ":8000",
 }