ci: run jazzy container after checkout

Author: steipete

.github/workflows/jazzy.yml

@@ -25,16 +25,15 @@ on:
 jobs:
   Jazzy:
     runs-on: ubuntu-latest
-    container:
-      image: norionomura/jazzy:0.13.3_swift-5.2.1
     steps:
-      - uses: actions/checkout@v2
-      - run: bundle install --path vendor/bundle
-      - run: swift build
-      - name: Generate documentation json
-        run: sourcekitten doc --spm-module InterposeKit > interposekit.json
-      - name: Run jazzy
-        run: bundle exec jazzy --clean --sourcekitten-sourcefile interposekit.json
+      - uses: actions/checkout@v4
+      - name: Build documentation
+        run: |
+          docker run --rm \
+            -v "$PWD:/workspace" \
+            -w /workspace \
+            norionomura/jazzy:0.13.3_swift-5.2.1 \
+            bash -lc "bundle install --path vendor/bundle && swift build && sourcekitten doc --spm-module InterposeKit > interposekit.json && bundle exec jazzy --clean --sourcekitten-sourcefile interposekit.json"
       - name: Validate documentation coverage
         run: |
           if ruby -rjson -e "j = JSON.parse(File.read('docs/undocumented.json')); exit j['warnings'].length != 0"; then