[FEAT] Allow insecure certificates on InfluxDB

This change allows users to skip TLS certificate verification on their
InfluxDB server, if they wish to do so, for instance when using self-
signed certificates.
Without this change, scrutiny failed to start and paniced with a
`x509: certificate signed by unknown authority` error.

webapp/backend/pkg/config/config.go

@@ -49,6 +49,7 @@ func (c *configuration) Init() error {
 	c.SetDefault("web.influxdb.init_username", "admin")
 	c.SetDefault("web.influxdb.init_password", "password12345")
 	c.SetDefault("web.influxdb.token", "scrutiny-default-admin-token")
+	c.SetDefault("web.influxdb.tls.insecure_skip_verify", false)
 	c.SetDefault("web.influxdb.retention_policy", true)
 
 	//c.SetDefault("disks.include", []string{})