Upgrade to use typescript instead of javascript and use game-ci images

* Upgrade to using typescript instead of javascript and use game-ci images instead of gableroux images

* Fix errors

* Update bash script

* Fix test

* Remove test

* Add versioning

* Update husky

* Update husky

* Update husky

* Update package.json

* Update husky and image-tag

* Use 'yarn lint-staged' instead of 'npx lint-staged'

* Update entrypoint.sh

src/model/image-tag.test.ts

@@ -0,0 +1,22 @@
+import ImageTag from './image-tag';
+
+describe('ImageTag', () => {
+  describe('constructor', () => {
+    const unityVersion = '2020.0.00f0';
+
+    it('can be called', () => {
+      expect(() => new ImageTag(unityVersion)).not.toThrow();
+    });
+
+    test.each(['2000.0.0f0', '2011.1.11f1'])('accepts %p version format', (version) => {
+      expect(() => new ImageTag(version)).not.toThrow();
+    });
+  });
+  describe('toString', () => {
+    it('returns the correct version', () => {
+      const image = new ImageTag('2099.1.1111');
+
+      expect(image.toString()).toStrictEqual(`unityci/editor:2099.1.1111-linux-il2cpp-0`);
+    });
+  });
+});