fix ci

.github/workflows/ci.yml

@@ -10,20 +10,22 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest]
-        crystal:
-          - latest
-          - nightly
-          - 1.0.0
+        include:
+          - {os: ubuntu-latest, crystal: latest}
+          - {os: ubuntu-latest, crystal: nightly}
+          - {os: ubuntu-latest, crystal: 1.0.0}
     runs-on: ${{ matrix.os }}
-    container: crystallang/crystal:${{ matrix.crystal }}-alpine
     steps:
-    - uses: actions/checkout@v2
-    - name: Install dependencies
-      run: shards install --ignore-crystal-version
-    - name: Lint
-      run: ./bin/ameba
-    - name: Format
-      run: crystal tool format --check
-    - name: Run tests
-      run: crystal spec -v --error-trace
+      - name: Install Crystal
+        uses: crystal-lang/install-crystal@v1
+        with:
+          crystal: ${{matrix.crystal}}
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        run: shards install --ignore-crystal-version
+      - name: Lint
+        run: ./bin/ameba
+      - name: Format
+        run: crystal tool format --check
+      - name: Run tests
+        run: crystal spec -v --error-trace