Chronograf connections using .src file

Community issue to address: https://community.influxdata.com/t/chronograf-not-loading-influxdb-connections-using-src-file/9274/2

- [ ] Update [this page](https://docs.influxdata.com/chronograf/v1.8/administration/creating-connections/#manage-kapacitor-connections-using-kap-files) to explicitly state when launching Chronograf with Docker, you must set the "resource path" in the docker-compose.yml. For example:
```# docker-compose.yml
version: '3.2'
services:
chronograf:
image: chronograf
environment:
RESOURCES_PATH: "/usr/share/chronograf/resources"
```
- [ ] Verify the following details with the engineering:
- Should the resource path "default" value be the same as the "canned path"? If not, remove this statement from the docs.
- If the resource path default value isn't the same as the canned path, where should the "resource path" be defined for folks not using Docker? Or is there a default other than the canned path?