Merged in feature/doc_import (pull request #177)

integration of background processor

* integration part 1

* feature working

* fix mimetype issue

internal/server/server.go

@@ -44,7 +44,9 @@ func New(ctx context.Context, cfg Config) (func() error, error) {
 	closeTracer := cfg.SetOtel(ctx)
 
 	version := build.GetVersion()
-	cfg.GetLogger().Info("Starting", "version", version)
+	if cfg.GetLogger() != nil {
+		cfg.GetLogger().Info("Starting", "version", version)
+	}
 
 	err := database.RunMigrations(ctx, cfg)
 	if err != nil {