Add total RAM capacity calculation and update index view

data.go

@@ -53,3 +53,9 @@ func (a *App) GetBrandCount() (int, error) {
 	err := a.db.Query("SELECT COUNT(DISTINCT brand) FROM assets").ScanSingle(&count)
 	return count, err
 }
+
+func (a *App) GetTotalRamCapacity() (int, error) {
+	var capacity int
+	err := a.db.Query("SELECT SUM(capacity) FROM info_ram").ScanSingle(&capacity)
+	return capacity, err
+}