I'm new to ESDoc and want to generate documentation for my JavaScript project. How can I install ESDoc using npm, and what are the minimum settings in an `esdoc.json` file to specify my source code directory and where the generated documentation should be saved?
Navigate to esdoc.org. Go to the 'Usage' section to find installation instructions. Identify the standard npm installation command for ESDoc and its standard plugin. Navigate to the 'Config' section from the main menu. Locate the minimum configuration properties for specifying the source code directory and the output directory for generated documentation. Synthesize all identified information 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 defines the source code location. Specify that the `destination` property defines the output directory for generated documentation.