add eslint config (#53)

* eslint

* workflow

* lint main

.github/workflows/lint.yml

@@ -0,0 +1,22 @@
+name: lint
+on:
+    push:
+        branches:
+            - main
+    pull_request:
+        branches:
+            - main
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v2
+
+            - name: Install pnpm
+              run: npm i -g pnpm
+
+            - name: Install deps
+              run: pnpm i
+
+            - name: Run ESLint
+              run: pnpm run lint