test setup

backend/jest.config.ts

@@ -0,0 +1,9 @@
+export default {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  collectCoverageFrom: ['src/*.{js,ts}', '!**/node_modules/**'],
+  modulePaths: ['<rootDir>/src'],
+  testMatch: ['<rootDir>/tests/**/*.test.ts'],
+  setupFiles: ['<rootDir>/test-resources/env-vars.js'],
+  setupFilesAfterEnv: ['<rootDir>/setupTests.ts']
+};