add single files, secure server, hello world

secure_server/simple_secure_server.dart

@@ -0,0 +1,23 @@
+import 'dart:io';
+
+String certificateChain = 'server_chain.pem';
+String serverKey = 'server_key.pem';
+
+Future main() async {
+  var serverContext = SecurityContext();
+  serverContext.useCertificateChain(certificateChain);
+  serverContext.usePrivateKey(serverKey, password: 'dartdart');
+
+  var server = await HttpServer.bindSecure(
+    '0.0.0.0',
+    8443,
+    serverContext,
+  );
+  print('Listening on localhost:${server.port}');
+  await for (HttpRequest request in server) {
+    print('Got request for ${request.uri.path}');
+    request.response
+      ..write('Hello, world!')
+      ..close();
+  }
+}