Show config error as status

Sources/App/ServerStatus.swift

@@ -9,4 +9,6 @@ enum ServerStatus: Int, Codable {
     case pushFailed = 2
     
     case starting = 3
+    
+    case failedToStart = 4
 }

Sources/App/configure.swift

@@ -23,13 +23,14 @@ public func configure(_ app: Application) throws {
         let data = try Data(contentsOf: configUrl)
         config = try JSONDecoder().decode(from: data)
     } catch {
-        print("Failed to load config: \(error)")
+        print("Failed to load config from \(configUrl.path): \(error)")
         return
     }
     
     app.http.server.configuration.port = config.port
     
     guard configureAPNS(config) else {
+        serverStatus = .failedToStart
         return
     }