I'm new to ESDoc and want to generate documentation for my JavaScript project. How do I install ESDoc using npm, and what are the essential settings in an `esdoc.json` file to specify my source code directory and where the generated documentation should be saved?
Navigate to esdoc.org. Click on the 'Usage' link. Scroll down to view the 'Installation' and 'Configuration' sections. Identify the npm command for installing ESDoc and its standard plugin. Identify the minimum `esdoc.json` configuration, specifically the properties for source and destination directories. Synthesize the installation command and the `source` and `destination` properties into a concise answer.
State the npm installation command as `npm install -g esdoc esdoc-standard-plugin`. Identify the main configuration file as `esdoc.json`. Specify that the `source` property ('./src') defines the source code location. Specify that the `destination` property ('./doc') defines the output directory for generated documentation.