feat: add eslint workflow

.eslintignore

@@ -2,3 +2,4 @@ vite.config.js
 .gitignore
 data
 mongo-init.js
+app/dist

.github/workflows/eslint.yml

@@ -0,0 +1,22 @@
+name: ESLint Checks
+
+on:
+  push:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 20
+
+      - name: Install dependencies
+        run: yarn install
+
+      - name: Lint
+        run: yarn lint

.prettierignore

@@ -1 +1,2 @@
 data/*
+app/dist