diff --git a/docker-compose.yml b/docker-compose.yml
index f7935aa1..e0decea5 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -54,6 +54,7 @@ services:
 
       # - SLACK_BOT_TOKEN=
       # - SLACK_CHANNEL_ID=
+      # - GOOGLE_CHAT_WEBHOOK_URL=
     depends_on:
       postgres:
         condition: service_healthy
diff --git a/server/.env.sample b/server/.env.sample
index 15d66ed7..34e863b0 100644
--- a/server/.env.sample
+++ b/server/.env.sample
@@ -45,6 +45,7 @@ SECRET_KEY=notsecretkey
 
 # SLACK_BOT_TOKEN=
 # SLACK_CHANNEL_ID=
+# GOOGLE_CHAT_WEBHOOK_URL=
 
 ## Do not edit this