Add github action config that runs eslint.

.github/workflows/checks.yml

@@ -0,0 +1,31 @@
+name: checks
+
+on: push
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    permissions:
+      contents: read
+      checks: write
+
+    steps:
+    - uses: actions/checkout@v4.1.1
+
+    - uses: actions/setup-node@v4.0.1
+      with:
+        node-version-file: '.node-version'
+
+    - name: setup gradle
+      uses: gradle/actions/setup-gradle@v3
+
+    - name: npm install
+      run: |
+        . environment
+        npm ci
+
+    - name: npm run ci
+      run: |
+        . environment
+        npm run ci
+

package.json

@@ -7,7 +7,8 @@
     "android": "expo start --android",
     "ios": "expo start --ios",
     "web": "expo start --web",
-    "lint": "eslint ."
+    "lint": "eslint .",
+    "ci": "npm run lint"
   },
   "dependencies": {
     "@tanstack/react-query": "5.25.0",