ft: add eslint

.eslintrc.yml

@@ -0,0 +1,25 @@
+env:
+  commonjs: true
+  es2021: true
+  node: true
+extends:
+  - eslint:recommended
+  - plugin:@typescript-eslint/recommended
+parser: '@typescript-eslint/parser'
+parserOptions:
+  ecmaVersion: latest
+plugins:
+  - '@typescript-eslint'
+rules:
+  indent:
+    - error
+    - tab
+  linebreak-style:
+    - error
+    - unix
+  quotes:
+    - error
+    - double
+  semi:
+    - error
+    - never

package.json

@@ -7,7 +7,8 @@
     "start": "node dist/server.js",
     "pretest": "npm run build",
     "test": "jest",
-    "build": "tsc"
+    "build": "tsc",
+    "lint": "eslint ./src"
   },
   "keywords": [
     "Template"
@@ -24,6 +25,9 @@
     "@types/koa": "^2.13.12",
     "@types/koa__router": "^12.0.4",
     "@types/supertest": "^6.0.2",
+    "@typescript-eslint/eslint-plugin": "^6.17.0",
+    "@typescript-eslint/parser": "^6.17.0",
+    "eslint": "^8.56.0",
     "jest": "^29.7.0",
     "supertest": "^6.3.3",
     "ts-node": "^10.9.2",