add azure container apps websocket URL example

Author: ks6088ts

.env.template

@@ -19,4 +19,5 @@ AZURE_AI_SPEECH_API_KEY="<YOUR_AZURE_AI_SPEECH_API_KEY>"
 AZURE_AI_SPEECH_ENDPOINT="https://<speech-api-name>.cognitiveservices.azure.com/"
 
 # Chats WebSocket
+# Azure Container Apps: `wss://yourcontainerapps.japaneast.azurecontainerapps.io`
 CHATS_WEBSOCKET_URL="ws://localhost:8000"