refactoring , dockerizing

yoga-cms/config/server.ts

@@ -0,0 +1,7 @@
+export default ({ env }) => ({
+  host: env('HOST', '0.0.0.0'),
+  port: env.int('PORT', 1337),
+  app: {
+    keys: env.array('APP_KEYS'),
+  },
+});