The gopher integration was not setting host or port, causing all links to break.

This will derive the host from the configured host by stripping the protocol from the URI

gopher.go

@@ -14,6 +14,7 @@ import (
 	"bytes"
 	"fmt"
 	"io"
+	"regexp"
 	"strings"
 
 	"github.com/prologic/go-gopher"
@@ -28,6 +29,11 @@ func initGopher(apper Apper) {
 	gopher.ListenAndServe(fmt.Sprintf(":%d", apper.App().Config().Server.GopherPort), nil)
 }
 
+// Utility function to strip the URL from the hostname provided by app.cfg.App.Host
+func stripHostProtocol(app *App) string {
+	return string(regexp.MustCompile("^.*://").ReplaceAll([]byte(app.cfg.App.Host), []byte("")))
+}
+
 func handleGopher(app *App, w gopher.ResponseWriter, r *gopher.Request) error {
 	parts := strings.Split(r.Selector, "/")
 	if app.cfg.App.SingleUser {
@@ -51,6 +57,8 @@ func handleGopher(app *App, w gopher.ResponseWriter, r *gopher.Request) error {
 
 	for _, c := range *colls {
 		w.WriteItem(&gopher.Item{
+			Host:        stripHostProtocol(app),
+			Port:        app.cfg.Server.GopherPort,
 			Type:        gopher.DIRECTORY,
 			Description: c.DisplayTitle(),
 			Selector:    "/" + c.Alias + "/",
@@ -99,6 +107,8 @@ func handleGopherCollection(app *App, w gopher.ResponseWriter, r *gopher.Request
 
 	for _, p := range *posts {
 		w.WriteItem(&gopher.Item{
+			Port:        app.cfg.Server.GopherPort,
+			Host:        stripHostProtocol(app),
 			Type:        gopher.FILE,
 			Description: p.CreatedDate() + " - " + p.DisplayTitle(),
 			Selector:    baseSel + p.Slug.String,