Add "setup" script

- install deps
- create env files

tools/scripts/setupEnvFiles.ts

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+import fs from 'fs';
+import * as path from 'path';
+
+const filesToCreate: { id: string; templatePath: string; targetPath: string }[] = [
+    {
+        id: 'root env',
+        templatePath: path.resolve(import.meta.dirname, '../../.env.template'),
+        targetPath: path.resolve(import.meta.dirname, '../../.env'),
+    },
+];
+
+filesToCreate.forEach(({ id, templatePath, targetPath }) => {
+    if (!fs.existsSync(templatePath)) {
+        console.warn(
+            `(id= ${id}) .env.template not found. Cannot create .env file. (template: ${templatePath}, target: ${targetPath})`,
+        );
+        return;
+    }
+
+    if (fs.existsSync(targetPath)) {
+        console.log(
+            `(id= ${id}) .env file already exists. Skipping. (template: ${templatePath}, target: ${targetPath})`,
+        );
+        return;
+    }
+
+    fs.copyFileSync(templatePath, targetPath);
+    console.log(`(id= ${id}) .env file created from .env.template. (template: ${templatePath}, target: ${targetPath})`);
+});