ci: run bundle install before docker build

Author: rahmatrhd

.github/workflows/release.yml

@@ -11,7 +11,11 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Build the Docker image
-        run: docker build . --file Dockerfile --tag gotocompany/gate:${{ github.ref_name }}
+        run: |
+          gem install bundler
+          bundle install
+          bundle exec rake assets:precompile RAILS_ENV=production
+          docker build . --file Dockerfile --tag gotocompany/gate:${{ github.ref_name }}
       - name: Login to DockerHub
         run: docker login -u ${{ secrets.DOCKERHUB_USERNAME }} -p ${{ secrets.DOCKERHUB_TOKEN }}
       - name: Push Docker image