feat: added /version endpoint

internal/api/handler/version.go

@@ -0,0 +1,23 @@
+package handler
+
+import (
+	"net/http"
+
+	"github.com/robindittmar/dttmr-api/internal/api/response"
+)
+
+type Version struct {
+	Version   string `json:"version"`
+	Commit    string `json:"commit"`
+	BuildTime string `json:"buildTime"`
+}
+
+func VersionHandler(version string, commit string, buildTime string) func(http.ResponseWriter, *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		response.JSON(r.Context(), w, http.StatusOK, Version{
+			Version:   version,
+			Commit:    commit,
+			BuildTime: buildTime,
+		})
+	}
+}