I find Docker very complementary to Node, not because I'm putting my code in a container but for all the databases and other software. When I'm running tests I

I find Docker very complementary to Node, not because I'm putting my code in a container but for all the databases and other software. When I'm running tests I automatically spin up a Redis or a Postgres or whatever database(s) are required. This lets tests run in parallel, projects co-exist etc, without any cross-contamination or shared/mixing of dependencies.