replace npm with yarn

Author: OscarMulder

.github/workflows/deploy-image.yml

@@ -26,7 +26,7 @@ jobs:
           node-version: 'lts/*'
 
       - name: Install dependencies
-        run: npm ci
+        run: yarn install --frozen-lockfile
 
       - name: Log in to the Container registry
         uses: docker/login-action@49ed152c8eca782a232dede0303416e8f356c37b # v2.0.0