Merge pull request #617 from spotify/freben/backend

Initial skeleton for the backend

packages/backend/.eslintrc.js

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+module.exports = {
+  rules: {
+    'no-console': 0, // Permitted in console programs
+    'new-cap': ['error', { capIsNew: false }], // Because Express constructs things e.g. like 'const r = express.Router()'
+  },
+};

packages/backend/package.json

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+{
+  "name": "example-backend",
+  "version": "0.1.1-alpha.4",
+  "main": "dist",
+  "private": true,
+  "license": "Apache-2.0",
+  "engines": {
+    "node": ">=12"
+  },
+  "scripts": {
+    "build": "tsc",
+    "start": "tsc-watch --onFirstSuccess nodemon",
+    "lint": "backstage-cli lint",
+    "test": "backstage-cli test",
+    "clean": "backstage-cli clean"
+  },
+  "dependencies": {
+    "cors": "^2.8.5",
+    "express": "^4.17.1",
+    "helmet": "^3.22.0"
+  },
+  "devDependencies": {
+    "@backstage/cli": "^0.1.1-alpha.4",
+    "@types/cors": "^2.8.6",
+    "@types/express": "^4.17.6",
+    "@types/express-serve-static-core": "^4.17.5",
+    "@types/helmet": "^0.0.45",
+    "tsc-watch": "^4.2.3",
+    "typescript": "^3.8.3"
+  },
+  "nodemonConfig": {
+    "watch": "./dist"
+  }
+}

packages/backend/src/index.test.ts

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+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+describe('test', () => {
+  it('unbreaks the test runner', () => {
+    expect(true).toBeTruthy();
+  });
+});

packages/backend/src/index.ts

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+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import express from 'express';
+import cors from 'cors';
+import helmet from 'helmet';
+import { testRouter } from './test';
+
+const PORT = 7000;
+const app = express();
+
+app.use(helmet());
+app.use(cors());
+app.use(express.json());
+app.use('/test', testRouter);
+
+app.listen(PORT, () => {
+  console.log(`Listening on port ${PORT}`);
+});

packages/backend/src/test/index.ts

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+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { Router } from 'express';
+
+export const testRouter = Router();
+
+testRouter.get('/', async (_, res) => {
+  res.status(200).send('hello');
+});

packages/backend/tsconfig.json

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+{
+  "include": ["src"],
+  "compilerOptions": {
+    "baseUrl": "src",
+    "outDir": "dist",
+    "incremental": true,
+    "sourceMap": true,
+    "strict": true,
+    "target": "es5",
+    "module": "commonjs",
+    "esModuleInterop": true
+  }
+}