chore(ci): backend jest config (#6772)

* fix: add ci mode, ci mode runs test in band to avoid context switch

* fix: ci crashing due to oom

* fix: increase ci worker count

* Revert "fix: ci crashing due to oom"

This reverts commit dff5171.

* feat: set workeridlememorylimit to 0.4

* feat: set workeridlememorylimit to 0.2

.github/workflows/ci.yml

@@ -154,7 +154,7 @@ jobs:
           path: '**/node_modules'
           key: ${{ runner.OS }}-node-modules-${{ hashFiles('**/package-lock.json') }}
       - run: npm ci --prefix serverless/virus-scanner
-      - run: npm run test:backend
+      - run: npm run test:backend:ci
         env:
           NODE_OPTIONS: '--max-old-space-size=4096'
       - name: Coveralls

package.json

@@ -27,6 +27,7 @@
     "postinstall": "npm run postinstall:frontend && npm run postinstall:shared",
     "test": "npm run test:backend && npm run test:frontend",
     "test:backend": "env-cmd -f __tests__/setup/.test-env jest",
+    "test:backend:ci": "env-cmd -f __tests__/setup/.test-env jest --maxWorkers=2 --logHeapUsage --workerIdleMemoryLimit=0.2",
     "test:backend:watch": "env-cmd -f __tests__/setup/.test-env jest --watch",
     "test:frontend": "npm --prefix frontend test",
     "test:e2e-v2": "npm run build && npx playwright test",