Merge pull request #17878 from storybookjs/tech/change-ci-parallelism-bootstrap

CI: set parallelism of nx to 2

.circleci/config.yml

@@ -92,7 +92,7 @@ jobs:
           command: yarn install --immutable
       - run:
           name: Bootstrap
-          command: yarn bootstrap --core
+          command: yarn bootstrap --build --manager
       - save_cache:
           name: Save Yarn cache
           key: build-yarn-2-cache-v3--{{ checksum "yarn.lock" }}

scripts/bootstrap.js

@@ -103,7 +103,7 @@ function run() {
       command: () => {
         log.info(prefix, 'prepare');
         spawn(
-          `nx run-many --target="prepare" --all --parallel ${
+          `nx run-many --target="prepare" --all --parallel=2 ${
             process.env.CI ? `--max-parallel=${maxConcurrentTasks}` : ''
           } -- --optimized`
         );