polishing readme and env

README.md

@@ -4,6 +4,8 @@ This is a simple web application that allows users to send emergency messages to
 
 tldr: I look at messaging apps very infrequently and have no notifications for them. But what happens if there's a real emergency and someone needs to grab my attention? The only app in my phone that has notifications is the ntfy client, which I use to monitor servers and services. Why not receive a ntfy alert? This small webapp lets my trusted ones send me a high priority message if needed.
 
+[![webapp.gif](https://i.postimg.cc/85P4ZfK4/webapp.gif)](https://postimg.cc/KKwtzjy3)
+
 More details:
 - You can deploy in a single `docker run`, simply passing the ntfy details through env vars.
 - You can use it with both the official ntfy instance or with a selfhosted instance of your own.

env.example

@@ -2,7 +2,7 @@
 NTFY_URL=https://your-ntfy-server.com
 NTFY_USER=your-username
 NTFY_PASSWORD=your-password
-NTFY_TOPIC=emergencia
+NTFY_TOPIC=emergency
 PORT=3000
 UI_MESSAGE=Send an emergency message