add lint action

.github/workflows/test.yml

@@ -0,0 +1,17 @@
+name: Test
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2.4.0
+    - uses: cachix/install-nix-action@v15
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - run: |
+        nix-shell --run 'npm install'
+        nix-shell --run 'make lint'

Makefile

@@ -13,3 +13,4 @@ publish:
 lint:
 	./node_modules/.bin/prettier --check web/src
 	./node_modules/.bin/eslint web/src --ext .js,.jsx,.ts,.tsx
+	test -z $$(gofmt -l .)