add api framework

internal/httpapp/handlers.go

@@ -30,12 +30,12 @@ func (a *App) handleMetrics(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "text/plain; version=0.0.4")
 	w.WriteHeader(http.StatusOK)
 	_, _ = w.Write([]byte(
-		`# HELP pluto_build_info Build info
-# TYPE pluto_build_info gauge
-pluto_build_info{version="v0.1.0-dev"} 1
-# HELP pluto_up Whether the pluto-api process is up
-# TYPE pluto_up gauge
-pluto_up 1
+		`# HELP atlas_build_info Build info
+# TYPE atlas_build_info gauge
+atlas_build_info{version="v0.1.0-dev"} 1
+# HELP atlas_up Whether the atlas-api process is up
+# TYPE atlas_up gauge
+atlas_up 1
 `,
 	))
 }