fix: drop dotenv dependency, use Node 24 built-in --env-file

.gitignore

@@ -2,7 +2,6 @@
 .env
 .vscode
 data
-ecosystem.config.cjs
 node_modules
 package-lock.json
 yarn.lock

app.ts

@@ -1,4 +1,3 @@
-import "dotenv/config";
 import path from "path";
 
 import express from "express";

ecosystem.config.cjs

@@ -0,0 +1,14 @@
+// @ts-check
+"use strict";
+
+/** @type {import("pm2").StartOptions} */
+const app = {
+  name: "respec-web-services",
+  script: "./build/app.js",
+  node_args: "--env-file-if-exists=.env --enable-source-maps",
+  env_production: {
+    NODE_ENV: "production",
+  },
+};
+
+module.exports = { apps: [app] };

package.json

@@ -14,7 +14,6 @@
     "chalk": "^5.6.2",
     "compression": "^1.8.1",
     "cors": "^2.8.6",
-    "dotenv": "^17.4.2",
     "express": "^5.2.1",
     "express-rate-limit": "^8.4.1",
     "helmet": "^8.1.0",
@@ -28,11 +27,11 @@
     "build": "tsc",
     "build:watch": "tsc -w",
     "prestart": "npm run update-data-sources && npm run regenerate-docs",
-    "start": "node --enable-source-maps build/app.js",
+    "start": "node --env-file-if-exists=.env --enable-source-maps build/app.js",
     "start:server": "pm2 start ecosystem.config.cjs --env production",
     "test": "jasmine --config=tests/jasmine.json",
     "regenerate-docs": "node --trace-warnings ./build/scripts/regenerate-docs.js",
-    "update-data-sources": "node build/scripts/update-data-sources.js"
+    "update-data-sources": "node --env-file-if-exists=.env build/scripts/update-data-sources.js"
   },
   "packageManager": "pnpm@9.8.0",
   "pnpm": {

scripts/update-data-sources.ts

@@ -1,4 +1,3 @@
-import "dotenv/config";
 import { mkdir } from "fs/promises";
 import { env } from "../utils/misc.js";
 import caniuse from "../routes/caniuse/lib/scraper.js";

scripts/update-w3c-groups-list.ts

@@ -1,13 +1,13 @@
 /**
- * Run this script occasionally to update {@link {DATA_DIR}/w3c/groups.json}
- * with new group shortnames and IDs.
+ * Updates {@link {DATA_DIR}/w3c/groups.json} with current group shortnames and IDs.
+ *
+ * Standalone: node --env-file-if-exists=.env build/scripts/update-w3c-groups-list.js
+ * Via npm:    npm run update-data-sources
  */
 
 import path from "path";
 import { writeFile, mkdir } from "fs/promises";
 
-import "dotenv/config";
-
 import { env } from "../utils/misc.js";
 
 const DATA_DIR = env("DATA_DIR");