chore: drop traffmonetizer version key, document its restart policy, add alloy .env.example

traffmonetizer/README.md

@@ -4,6 +4,11 @@
 in `compose.yml` with `container_name: tm` and `restart: always`. It
 only makes outbound connections, so there is no port to map a domain to.
 
+`restart: always` instead of `unless-stopped` is on purpose: the client should
+be restarted as often as possible. Docker brings it back even after a manual
+stop once the daemon or host restarts. The Coolify app also has no watch path
+for the same reason, so every push to the repository redeploys it.
+
 The image tag is `arm64v8`. Change it to match the host architecture.
 
 ## Environment