feat: Store the server version on start

src/init/ModuleVersionVerifier.ts

@@ -0,0 +1,30 @@
+import { readJson } from 'fs-extra';
+import type { KeyValueStorage } from '../storage/keyvalue/KeyValueStorage';
+import { modulePathPlaceholder, resolveAssetPath } from '../util/PathUtil';
+import { Initializer } from './Initializer';
+
+const PACKAGE_JSON_PATH = `${modulePathPlaceholder}package.json`;
+
+/**
+ * This initializer simply writes the version number of the server to the storage.
+ * This will be relevant in the future when we look into migration initializers.
+ *
+ * It automatically parses the version number from the `package.json`.
+ */
+export class ModuleVersionVerifier extends Initializer {
+  private readonly storageKey: string;
+  private readonly storage: KeyValueStorage<string, string>;
+
+  public constructor(storageKey: string, storage: KeyValueStorage<string, string>) {
+    super();
+    this.storageKey = storageKey;
+    this.storage = storage;
+  }
+
+  public async handle(): Promise<void> {
+    const path = resolveAssetPath(PACKAGE_JSON_PATH);
+    const pkg = await readJson(path);
+
+    await this.storage.set(this.storageKey, pkg.version);
+  }
+}