move some parts to services and introduce the backend communication for the airports

src/services/configuration.ts

@@ -0,0 +1,7 @@
+export const Configuration = {
+  resourceServer: process.env.RESOURCE_SERVER || 'http://localhost:3000',
+  vatsim: {
+    authorizeUrl: process.env.VATSIM_AUTH_URL || 'https://auth-dev.vatsim.net/oauth/authorize',
+    clientId: process.env.VATSIM_CLIENT_ID || '461',
+  },
+};