Specify production setting in configuration

Sources/App/Management/Configuration.swift

@@ -6,6 +6,13 @@ struct Configuration {
 
     let mail: EMail
 
+    /**
+     Use a database file and reduce logging.
+
+     If this property is set to `false`, then an in-memory database is used with increased logging.
+     */
+    let production: Bool
+
     struct EMail {
 
         /// The url to the root of the server

Sources/App/configure.swift

@@ -16,11 +16,10 @@ public func configure(_ app: Application) throws {
     // Set target environment
     app.environment = .production
 
-    if app.environment == .development {
+    if !configuration.production {
         app.logger.logLevel = .info
         print("[DEVELOPMENT] Using in-memory database")
         app.databases.use(.sqlite(.memory), as: .sqlite)
-        
     } else {
         app.logger.logLevel = .notice
         let dbFile = storageFolder.appendingPathComponent("db.sqlite").path