chore: add CI pipeline with lint, build and test

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Build
+        run: npm run build
+
+      - name: Test
+        run: npm test

.prettierrc

@@ -0,0 +1,7 @@
+{
+  "singleQuote": true,
+  "trailingComma": "all",
+  "printWidth": 100,
+  "tabWidth": 2,
+  "semi": true
+}

README.md

@@ -4,6 +4,7 @@ A backend service that simulates a Pix payment provider — focused on the parts
 
 Built as a portable demo of the techniques I apply when working with real payment systems.
 
+![CI](https://github.com/lmoraesdev/pix-payment-core/actions/workflows/ci.yml/badge.svg)
 ![nodejs](https://img.shields.io/badge/Node.js-20-339933?logo=nodedotjs&logoColor=white)
 ![typescript](https://img.shields.io/badge/TypeScript-5.x-3178C6?logo=typescript&logoColor=white)
 ![nestjs](https://img.shields.io/badge/NestJS-11-E0234E?logo=nestjs&logoColor=white)

eslint.config.mjs

@@ -0,0 +1,20 @@
+// @ts-check
+import tseslint from 'typescript-eslint';
+import prettier from 'eslint-config-prettier';
+
+export default tseslint.config(
+  {
+    ignores: ['dist/**', 'node_modules/**', 'coverage/**'],
+  },
+  ...tseslint.configs.recommended,
+  prettier,
+  {
+    rules: {
+      '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
+      '@typescript-eslint/no-explicit-any': 'warn',
+      '@typescript-eslint/explicit-function-return-type': 'off',
+      '@typescript-eslint/explicit-module-boundary-types': 'off',
+      '@typescript-eslint/no-empty-object-type': 'off',
+    },
+  },
+);