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  - Working with Bundler
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Databases & Data Management
- Heroku Postgres
  - Postgres Basics
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  - Postgres Special Topics
- Heroku Data For Redis
- Apache Kafka on Heroku
- Other Data Stores

Monitoring & Metrics
- Logging

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Add-ons
- All Add-ons

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Security
- App Security
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Heroku Enterprise
- Private Spaces
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  - Heroku Connect Administration
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Extending Heroku
- Platform API
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- Dev Center

Accounts & Billing

Troubleshooting & Support

Integrating with Salesforce

Default Ruby for New Apps is Now 2.4.4

Change effective on 31 May 2018

The default Ruby version for new Ruby applications is 2.4.4. You’ll only get the default if the application does not specify a ruby version.

Ruby 2.6.0-preview2 now available on Heroku Git server updated to mitigate security vulnerability