Adapting this to build a Twitter bot

Hello @marekq, thanks for building this.
I want to use this to build a Twitter bot. I don't need the SES email feature, Algolia, etc. Can you tell me how can I adapt this to my use case? I mean what parts should I care about?
If I want to build a Twitter bot that alerts me whenever there is a new post, should I need Dynamodb? or simple caching is enough?
I'd appreciate any tips. Thank you.