remove put restriction

Author: alexguja

Diff for: README.md

@@ -12,7 +12,7 @@ task run
 ### Creating a heartbeat
 
 ```sh
-curl -X PUT http://localhost:8181/{id}
+curl http://localhost:8181/{id}
 ```
 
 ### Checking an existing heartbeat

Diff for: main.go

@@ -169,7 +169,7 @@ func run(cliCtx *cli.Context) error {
 
 func internalRouter() http.Handler {
 	mux := http.NewServeMux()
-	mux.HandleFunc("PUT /{id}", handlePutHeartbeat)
+	mux.HandleFunc("/{id}", handlePutHeartbeat)
 	return mux
 }