Using PostGIS with Azure Database for PostgreSQL

With libelo we are building a platform for discovering parks and nature highlights. Almost all entities in our platform have a location attached: parks have boundaries, highlights like waterfalls or viewpoints have a precise coordinate, and users browse the app with their current position in hand. That means almost every interesting query the backend runs is spatial in some way. Which parks are nearby? Which park contains this highlight? What is the closest trail to where I am standing right now