feat: ESLint integration

Author: mvegter

.eslintrc

@@ -0,0 +1,20 @@
+{
+    "env": {
+        "es6": true,
+        "node": true
+    },
+    "parserOptions": {
+        "sourceType": "module"
+    },
+    "extends": [
+        "eslint:recommended"
+    ],
+    "rules": {
+        "no-unused-vars": [
+            "error",
+            {
+                "argsIgnorePattern": "^_"
+            }
+        ]
+    }
+}

.github/workflows/backend.yml

@@ -63,3 +63,23 @@ jobs:
       with:
         flags: backend
         file: ./backend/coverage/coverage-final.json
+  linter:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        node-version: [12.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - name: Installing dependencies
+      run: npm ci
+      working-directory: ./backend
+    - name: Running linter
+      run: npm run lint
+      working-directory: ./backend

.github/workflows/frontend.yml

@@ -31,3 +31,23 @@ jobs:
       working-directory: ./frontend
       env:
         CI: true
+  linter:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        node-version: [12.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - name: Installing dependencies
+      run: npm ci
+      working-directory: ./frontend
+    - name: Running linter
+      run: npm run lint
+      working-directory: ./frontend