[github] improve CI

Author: drunkwinter

.editorconfig

@@ -8,6 +8,6 @@ indent_style = space
 insert_final_newline = true
 trim_trailing_whitespace = true
 
-[*.{json}]
+[*.{json, yml}]
 tab_width = 2
 indent_size = 2

.github/workflows/build.yml

@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+  workflow_dispatch:
+
+# Prevent all permissions from being set, just use the ones we need.
+permissions:
+  contents: read
+
+# Cancel in-progress runs on new commits.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  Format:
+    # Prevent running this on forks
+    if: github.repository_owner == 'zerodytrash'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 'lts/*'
+          cache: 'npm'
+      - run: npm ci
+      - run: npm run check-format