Configure MeeSign Server for test client via enviromental variables (#13)

Configure the MeeSign server domain and port via enviromental variables. This allows for easier integration tests.

Author: quapka

meesign_core/test/core_test.dart

@@ -56,6 +56,11 @@ void main() {
 
   List<int>? serverCerts;
   final String? serverCertsPath = io.Platform.environment['SERVER_CERTS'];
+  final String? meesignServerDomain =
+      io.Platform.environment['MEESIGN_SERVER_DOMAIN'];
+  final String? meesignServerPort =
+      io.Platform.environment['MEESIGN_SERVER_PORT'];
+
   if (serverCertsPath != null) {
     serverCerts = io.File(serverCertsPath).readAsBytesSync();
   }
@@ -64,10 +69,12 @@ void main() {
     database = Database(appDir);
     keyStore = KeyStore(appDir);
     dispatcher = NetworkDispatcher(
-      'localhost',
+      meesignServerDomain ?? "localhost",
       keyStore,
       serverCerts: serverCerts,
       allowBadCerts: serverCerts == null,
+      // TODO is there a better way to set the default?
+      port: int.tryParse(meesignServerPort ?? "") ?? 1337,
     );
     deviceRepository = DeviceRepository(
       dispatcher,