Deprecated bundler option in manual instructions

[biggianteye]

Description of the issue 📄

The instructions for setting up the project locally on your machine (without Docker) include this command:

bundle install --without production

Running this command shows the following deprecation warning:

[DEPRECATED] The --without flag is deprecated because it relies on being remembered across bundler invocations, which bundler will no longer do in future versions. Instead please use bundle config set without 'production', and stop using this flag

Screenshots 📷

n/a

Steps to fix 🛠

To do 📋

• [ ] Claim this issue (comment below, or assign yourself if you are part of the codebar org)
• [ ] Fork and clone the repository
• [ ] Update the relevant files. Follow the steps to fix section in this issue.
• [ ] Commit your changes as one commit. Use the title of this issue as your commit message
• [ ] Submit a pull request
• [ ] Mention this issue in the PR description by including it's number
• [ ] Have your pull request reviewed & merged by a codebar team member