Replace deprecated bundle options with environment variables

Author: mallowlabs

.github/workflows/ci.yml

@@ -15,5 +15,7 @@ jobs:
       - uses: ruby/setup-ruby@v1
         with:
           bundler-cache: true
-      - run: bundle install --jobs 4 --retry 3 --path vendor/bundle
+      - run: bundle install --jobs 4 --retry 3
+        env:
+          BUNDLE_PATH: vendor/bundle
       - run: bundle exec jekyll build

README.md

@@ -5,7 +5,7 @@ The offcial site of codefirst.
 Requirements
 ---------------------------
 
-    $ bundle install --path .bundle
+    $ BUNDLE_PATH=vendor/bundle bundle install
 
 How to commit:
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