AI-powered Elastic search alternative, for small project?

I am developing a job board using NodeJs and it currently has around 1,000 items. However, I am facing an issue with deploying it on a 1GB RAM VPS as it cannot run Elastic Search on it. Therefore, I am searching for a lightweight search engine that can provide personalized search results. For instance, if a user is searching for or viewing a PHP job in New York, I will add the dataset into the search engine's history and retrain it. This way, the search engine will give a higher score to jobs based in New York. Additionally, I would like the search engine to provide recommendations for related jobs to the user.

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