Introduce TypeScript and an integration test

.gitattributes

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+* text eol=lf

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+
+defaults:
+  run:
+    working-directory: packages/scans
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, windows-latest, macos-latest ]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v3
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 16.x
+          cache: npm
+          cache-dependency-path: packages/scans/package-lock.json
+      - name: Install
+        run: npm ci
+      - name: Lint
+        run: npm run lint
+      - name: Run tests
+        run: npm test
+      - name: Build
+        run: npm run build

packages/scans/.eslintrc.js

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+module.exports = {
+  root: true,
+  parser: "@typescript-eslint/parser",
+  plugins: ["@typescript-eslint", "prettier"],
+  parserOptions: {
+    project: ["./tsconfig.json"],
+  },
+  extends: [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:@typescript-eslint/recommended-requiring-type-checking",
+    "plugin:jest/recommended",
+    "plugin:jest/style",
+    "plugin:jest-formatting/strict",
+    "prettier"
+  ],
+  rules: {
+    // This rule would disallow using async to make the result a promise
+    "@typescript-eslint/require-await": "off",
+    // Enable auto-fixing for prettier rules
+    "prettier/prettier": "error"
+  },
+};

packages/scans/.npmignore

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+*
+!dist/**/*
+!package.json
+!README.md

packages/scans/CONTRIBUTING.md

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+# Contributing
+
+## Setting up the project
+
+You need to `npm install` dependencies. Then you can lint with
+`npm run lint`, test with `npm test`, and build with `npm run build`.

packages/scans/README.md

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 The following repository contains common code and helper functionalities to run the ZAP baseline scan and full scan with
 GitHub Actions.
+
+## Contributing
+
+See [CONTRIBUTING.md](./CONTRIBUTING.md).

packages/scans/jest.config.js

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+/** @type {import('ts-jest').JestConfigWithTsJest} */
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  reporters: [
+    'default',
+    'github-actions',
+  ],
+  "setupFilesAfterEnv": ["jest-os-detection"],
+};