Fix CI deployment

.github/workflows/main.yml

@@ -13,6 +13,7 @@ jobs:
     - uses: actions/setup-node@v2
       with:
         node-version: '16'
+    - run: yarn
     - run: PUBLIC_URL=/techradar yarn build:static
     - uses: jakejarvis/s3-sync-action@master
       with:

package.json

@@ -4,7 +4,6 @@
   "main": "index.js",
   "license": "MIT",
   "scripts": {
-    "prebuild": "yarn",
     "build": "aoe_technology_radar-buildRadar",
     "postbuild": "yarn generateJson",
     "prebuild:static": "yarn build",