updated buildspec

buildspec.staging.yml

@@ -3,23 +3,11 @@ version: 0.2
 phases:
   install:
     runtime-versions:
-       nodejs: 18
-    commands:
-      - npm install -g yarn
-      - echo yarn -v
-      - yarn -v
-  pre_build:
-    commands:
-      - echo "@sinossi:registry=https://git.sinossi.it/api/v4/projects/271/packages/npm/" > .npmrc
-      - echo "//git.sinossi.it/api/v4/projects/271/packages/npm/:_authToken=kdP6WxGtg71-MzJZDRe9" >> .npmrc
-      - yarn install
+       nodejs: 20
   build:
     commands:
-      - yarn extract
-      - yarn compile
-      - mkdir -pv public/loaded-files
-      - yarn build:staging
+      - npm install && npm run build:staging
 artifacts:
   files:
     - '**/*'
-  base-directory: 'build'
+  base-directory: 'build'