'Docker' not installed
Hello, I'm a new Wasp user and have very little knowledge of code and got stuck in the process of running an app. I almost successfully ran my project but then it said it couldn't connect to the database, which said could be easily started with 'wasp start db'. Did that, but then it said 
--- [Error] Couldn't find
To run PostgreSQL dev database, Wasp needs
How do I install 'docker' and put it in PATH? What/where is docker and PATH?
--- [Error] Couldn't find docker executable: ---------------------------------To run PostgreSQL dev database, Wasp needs
docker installed and in PATH.How do I install 'docker' and put it in PATH? What/where is docker and PATH?
