For websites, just Ruby on Rails hosted on Heroku with Postgres. For web applications React with optional state management (Redux Saga / Mobx) for the front,

For websites, just Ruby on Rails hosted on Heroku with Postgres. For web applications React with optional state management (Redux Saga / Mobx) for the front, hosted on Netlify. Ruby on Rails in API mode, with Postgres running on Heroku if the API is non real-time or high traffic / spiky. Go with DynamoDB if it is.