Make the linter happier

ref #3

src/models/Track.ts

@@ -1,14 +1,14 @@
-import {Entity, PrimaryGeneratedColumn, Column} from "typeorm";
+import { Entity, PrimaryGeneratedColumn, Column } from "typeorm";
 
 @Entity()
 export class Track {
     @PrimaryGeneratedColumn()
-    id!: number;
+    id: number;
 
     @Column()
-    name!: string;
+    name: string;
 
     //Length in meters
     @Column()
-    length!: string;
-}
+    length: string;
+}