Set yarn version

.github/workflows/master.yml

@@ -10,21 +10,21 @@ env:
   AZURE_WEBAPP_NAME: pos-backend-staging # set this to your application's name
   AZURE_WEBAPP_PACKAGE_PATH: 'dist' # set this to the path to your web app project, defaults to the repository root
   NODE_VERSION: '18.x' # set this to the node version to use
+  YARN_VERSION: '1.22.22' # set this to the desired Yarn version
 
 jobs:
   build-and-deploy:
     name: Build and Deploy
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@master
-      - name: Install latest Yarn
-        run: npm install -g yarn
-      - name: Print Yarn version
-        run: yarn --version
       - name: Use Node.js ${{ env.NODE_VERSION }}
         uses: actions/setup-node@v1
         with:
           node-version: ${{ env.NODE_VERSION }}
+          yarn-version: ${{ env.YARN_VERSION }}
+      - name: Print Yarn version
+        run: yarn --version
       - name: yarn install and build
         run: |
           # Build and test the project, then