Add num-images and heap-in-use fields to /about

handlers/about.go

@@ -2,15 +2,23 @@ package handlers
 
 import (
 	"net/http"
+	"runtime"
 
 	"github.com/labstack/echo/v4"
 
 	"git.sr.ht/~cwpearson/replicate-jump-server/config"
+	"git.sr.ht/~cwpearson/replicate-jump-server/store"
 )
 
 func AboutGet(c echo.Context) error {
-	return c.JSON(http.StatusOK, map[string]string{
-		"version":    config.GitSHA(),
-		"build-date": config.BuildDate(),
+
+	ms := &runtime.MemStats{}
+	runtime.ReadMemStats(ms)
+
+	return c.JSON(http.StatusOK, map[string]any{
+		"version":     config.GitSHA(),
+		"build-date":  config.BuildDate(),
+		"num-images":  store.NumImages(),
+		"heap-in-use": ms.HeapInuse,
 	})
 }

store/store.go

@@ -117,3 +117,10 @@ func Save(data []byte, contentType string) string {
 	}
 	return store.Save(data, contentType)
 }
+
+func NumImages() int {
+	if store == nil {
+		store = newStore()
+	}
+	return len(store.images)
+}