Add eslint CI check

.github/workflows/ci.yml

@@ -0,0 +1,12 @@
+name: CI
+on: [push, pull_request]
+
+jobs:
+  format-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+      - run: |
+          npm install
+          npx eslint .

README.md

@@ -1,2 +1,7 @@
 # NorthstarMasterServer
-Master server for Northstar
+
+The master server is responsible for centralizing game servers created by players, it also verifies that connecting players own an Origin account with Titanfall 2.
+
+### Format
+
+This project uses `eslint` to format code, make sure you run `eslint --fix .` before opening a Pull Request.