diff --git a/.env.example b/.env.example
index c62f8f7..d32ca37 100644
--- a/.env.example
+++ b/.env.example
@@ -1,6 +1,51 @@
+# Copypaste this files as .env and fill blanks
+
+# used to ensure this env files is loaded exactly one
+ENV_FILE_LOADED=true
+
 PORT=3012
 
 # https://yandex.cloud/ru/docs/serverless-containers/quickstart/container#cli_1
 REGISTRY_NAME="nezort11-registry"
 CONTAINER_NAME="serverless-curl-impersonate"
 SERVICE_ACCOUNT_ID="..."
+
+# CONTAINER_NUMBER=""
+
+# # https://github.com/FOSWLY/vot-cli/blob/main/src/config/config.js
+# # EXPIRES AFTER SOME TIME
+# YANDEX_TRANSLATE_HMAC_SHA254_SECRET=""
+
+# BOT_TOKEN_PROD=""
+# BOT_TOKEN_DEV=""
+# BOT_PUBLIC_USERNAME=""
+# OWNER_USERNAME=""
+
+# APP_ID=""
+# APP_HASH=""
+# # npx tglogin
+# SESSION_PROD=""
+# SESSION_DEV=""
+
+# NOTIFICATION_BOT_TOKEN=""
+# NOTIFICATION_USER_ID=""
+# STORAGE_CHANNEL_CHAT_ID=""
+
+# SENTRY_DSN=""
+
+# IMAGE_TRANSLATE_URL=""
+
+# LOGGING_CHANNEL_ID=""
+
+# # REGISTRY_NAME=""
+# # CONTAINER_NAME=""
+# # IMAGE_NAME=""
+# # SERVICE_ACCOUNT_ID=""
+# # CONTAINER_DOMAIN=""
+
+# # UPLOADER_URL_PROD="http://telegram_upload:3000"
+# # UPLOADER_URL_DEV="http://127.0.0.1:3000"
+
+# # SERVER_PASSWORD=""
+
+
diff --git a/src/env.ts b/src/env.ts
index 5f6aacf..8fc5ce3 100644
--- a/src/env.ts
+++ b/src/env.ts
@@ -1,16 +1,18 @@
 import dotenv from "dotenv";
 
-export const DEBUG_ENV = process.env.DEBUG_ENV;
-console.log("DEBUG_ENV", DEBUG_ENV);
 export const NODE_ENV = process.env.NODE_ENV;
 console.log("NODE_ENV", NODE_ENV);
 export const IS_PRODUCTION = process.env.NODE_ENV !== "development";
 
-// otherwise loaded directly by docker env/env_file
-if (DEBUG_ENV) {
+// ensure env is loaded once (prevent duplicate loading)
+// otherwise loaded directly by docker env/env_file or serverless environment/etc.
+if (!process.env.ENV_FILE_LOADED) {
   // const dotenv = await import("dotenv/lib/main"); // this produces ERROR cuz of dotenv package.json exports field
   // const dotenv = await import("dotenv"); // required ESNext module which breaks a lot
   dotenv.config({ path: "./.env" }); // mutates process.env from .env
 }
 
+export const DEBUG_ENV = process.env.DEBUG_ENV === "true";
+console.log("DEBUG_ENV", DEBUG_ENV);
+
 export const PORT = process.env.PORT;
diff --git a/src/types/env.d.ts b/src/types/env.d.ts
index 2be347e..2b1b4e5 100644
--- a/src/types/env.d.ts
+++ b/src/types/env.d.ts
@@ -3,8 +3,11 @@ export {};
 declare global {
   namespace NodeJS {
     interface ProcessEnv {
+      ENV_FILE_LOADED: "true" | undefined;
+
       NODE_ENV: "development" | "production";
-      DEBUG: "true" | "false";
+      DEBUG: "*";
+      DEBUG_ENV: "true" | undefined;
     }
   }
 }