fix(docker): expose port 9091 and allow external API access

Add 9091 port mapping to compose.yml to make the REST API reachable
from outside the container. Previously only port 9090 (metrics) was
published, making the documented curl commands non-functional.

fixes #434

Dockerfile

@@ -38,6 +38,7 @@ USER telemt
 
 EXPOSE 443
 EXPOSE 9090
+EXPOSE 9091
 
 ENTRYPOINT ["/app/telemt"]
 CMD ["config.toml"]