fix(config.go): specify defaults for server configs

Author: arschles

pkg/sshd/config.go

@@ -1,7 +1,7 @@
 package sshd
 
 type Config struct {
-	FetcherPort int    `envconfig:"fetcher_port"`
-	SSHHostIP   string `envconfig:"ssh_host_ip"`
-	SSHHostPort int    `envconfig:"ssh_host_port"`
+	FetcherPort int    `envconfig:"fetcher_port" default:"3000"`
+	SSHHostIP   string `envconfig:"ssh_host_ip" default:"0.0.0.0"`
+	SSHHostPort int    `envconfig:"ssh_host_port" default:"2223"`
 }