feat: add info handler on sharedapi

Author: gfyrag

sharedapi/go.mod

@@ -0,0 +1,3 @@
+module github.com/formancehq/go-libs/sharedapi
+
+go 1.19

sharedapi/handler_info.go

@@ -0,0 +1,18 @@
+package sharedapi
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+type ServiceInfo struct {
+	Version string `json:"version"`
+}
+
+func InfoHandler(info ServiceInfo) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if err := json.NewEncoder(w).Encode(info); err != nil {
+			panic(err)
+		}
+	}
+}