db: Migrate FileUpload.ContentTypes to auto-detect

cmd/rushlink/main.go

@@ -18,15 +18,15 @@ var (
 func main() {
 	flag.Parse()
 
-	database, err := db.OpenDB(*databasePath)
-	if err != nil {
-		log.Fatalln(err)
-	}
-	defer database.Close()
 	filestore, err := db.OpenFileStore(*fileStorePath)
 	if err != nil {
 		log.Fatalln(err)
 	}
+	database, err := db.OpenDB(*databasePath, filestore)
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer database.Close()
 
 	go rushlink.StartMetricsServer(*metricsListen, database, filestore)
 	rushlink.StartMainServer(*httpListen, database, filestore)