Environment variables and configuration

Configurations can be done with flags or environment variables. The table below outlines all supported options and their respective env vars.

Flag	Env Variable	Default
`--addr`	`DOZZLE_ADDR`	`:8080`
`--base`	`DOZZLE_BASE`	`/`
`--hostname`	`DOZZLE_HOSTNAME`	`""`
`--level`	`DOZZLE_LEVEL`	`info`
`--filter`	`DOZZLE_FILTER`	`""`
`--username`	`DOZZLE_USERNAME`	`""`
`--password`	`DOZZLE_PASSWORD`	`""`
`--usernamefile`	`DOZZLE_USERNAME_FILE`	`""`
`--passwordfile`	`DOZZLE_PASSWORD_FILE`	`""`
`--no-analytics`	`DOZZLE_NO_ANALYTICS`	false
`--remote-host`	`DOZZLE_REMOTE_HOST`