From 6f111a42e92a173466313c000e569831bc409496 Mon Sep 17 00:00:00 2001
From: Balakrishnan Balasubramanian <git.user@balki.me>
Date: Wed, 5 Apr 2023 11:28:16 -0400
Subject: [PATCH] Add usage

---
 main.go | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/main.go b/main.go
index fc5e176..cabf71f 100644
--- a/main.go
+++ b/main.go
@@ -26,12 +26,20 @@ import (
 var Version string
 var apiToken string
 
+var usage string = `Telegram List bot
+Environment variables:
+TGLB_API_TOKEN (required): See https://core.telegram.org/bots#how-do-i-create-a-bot
+TGLB_PORT (default 28923): Set numerical port or unix//run/path.sock for unix socket
+TGLB_DATA_PATH (default .): Directory path where list data is stored
+`
+
 func main() {
 
 	apiToken = os.Getenv("TGLB_API_TOKEN")
 
 	if apiToken == "" {
-		log.Panicln("TG_API_TOKEN is empty")
+		log.Print(usage)
+		log.Panicln("TGLB_API_TOKEN is empty")
 	}
 
 	port, unixSocketPath := func() (int, string) {