Read/write css file from app settings. Changed order of operations at app startup. Added nano to Dockerfile

routes/config.js

@@ -8,6 +8,8 @@ const {
   updateValue,
   updateValues,
   deletePair,
+  updateCss,
+  getCss,
 } = require('../controllers/config');
 
 router
@@ -22,4 +24,9 @@ router
   .put(updateValue)
   .delete(deletePair);
 
+router
+  .route('/0/css')
+  .get(getCss)
+  .put(updateCss);
+
 module.exports = router;