Merge pull request #342 from juhp/add-build-ci

add GH action to build the project

.github/workflows/build.yml

@@ -0,0 +1,27 @@
+name: build
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: Haskell GHC
+    steps:
+      - uses: actions/checkout@v4
+      - uses: haskell-actions/setup@v2
+        with:
+          enable-stack: true
+          stack-no-global: true
+      - uses: actions/cache@v4
+        with:
+          path: |
+            ~/.stack
+            .stack-work
+          key: ${{ runner.os }}-${{ hashFiles('**/*.cabal','**/stack.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-
+      - run: stack build