Set up GitHub actions

Author: michaldudak

.github/workflows/nodejs.yml

@@ -6,25 +6,12 @@ jobs:
   build:
     runs-on: ubuntu-latest
 
-    env:
-      YARN_ENABLE_MIRROR: 'false'
-      YARN_ENABLE_GLOBAL_CACHE: 'false'
-
     steps:
       - uses: actions/checkout@v2
 
       - uses: actions/setup-node@v2
         with:
-          node-version: 14.x
-
-      - uses: actions/cache@v2
-        with:
-          path: .yarn/cache
-          key: yarn2-${{ hashFiles('yarn.lock') }}
-          restore-keys: |
-            yarn2-
+          node-version: 20.x
 
-      - run: yarn --immutable
-      - run: yarn build
-      - run: yarn test
-      - run: yarn prettier --check .
+      - run: pnpm build
+      - run: pnpm prettier --check .