refactor: use atomic renames for uploaded files (#372)

Co-authored-by: Kyle Mendell <kmendell@ofkm.us>
Co-authored-by: Elias Schneider <login@eliasschneider.com>

backend/internal/model/app_config.go

@@ -1,5 +1,9 @@
 package model
 
+import (
+	"strconv"
+)
+
 type AppConfigVariable struct {
 	Key          string `gorm:"primaryKey;not null"`
 	Type         string
@@ -9,6 +13,11 @@ type AppConfigVariable struct {
 	DefaultValue string
 }
 
+func (a *AppConfigVariable) IsTrue() bool {
+	ok, _ := strconv.ParseBool(a.Value)
+	return ok
+}
+
 type AppConfig struct {
 	// General
 	AppName             AppConfigVariable