Adding build badge

.drone.yml

@@ -6,7 +6,6 @@ steps:
 - name: Unit Test and lint
   image: golang:1.23-bookworm
   commands:
-  # - go build
   - go mod download
   - go test -v ./...
   - go vet ./...

README.md

@@ -1,5 +1,8 @@
 # Learn MQTT with Go
 
+![build-status](https://drone.runcible.io/api/badges/learning/learn_mqtt_go/status.svg)
+
+
 Learning MQTT with Golang by doing. This repo is a simple example of using a Golang application as a client (pub & sub) of an MQTT broker.
 
 1883, Eclipse Mosquitto unsecured (opening the port on the internet is not recommended).