Fix alpha sort cop error

Dockerfile

@@ -4,6 +4,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     build-essential \
     libpq-dev \
     postgresql-client \
+    git \
   && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 WORKDIR /usr/src/app

Gemfile

@@ -53,8 +53,8 @@ gem "image_processing", "~> 1.2"
 
 gem "brakeman"
 gem "bundler-audit"
-gem "rubocop-rails"
 gem "net-smtp"
+gem "rubocop-rails"
 
 group :development, :test do
   # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem