outposts/proxy: fix securecookie: no codecs provided error with redis

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

cmd/proxy/server.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"net/url"
 	"os"
+	"strconv"
 
 	log "github.com/sirupsen/logrus"
 
@@ -20,7 +21,8 @@ Required environment variables:
 - AUTHENTIK_INSECURE: Skip SSL Certificate verification
 
 Optionally, you can set these:
-- AUTHENTIK_HOST_BROWSER: URL to use in the browser, when it differs from AUTHENTIK_HOST`
+- AUTHENTIK_HOST_BROWSER: URL to use in the browser, when it differs from AUTHENTIK_HOST
+- AUTHENTIK_PORT_OFFSET: Offset to add to the listening ports, i.e. value of 100 makes proxy listen on 9100`
 
 func main() {
 	log.SetLevel(log.DebugLevel)
@@ -36,6 +38,15 @@ func main() {
 		fmt.Println(helpMessage)
 		os.Exit(1)
 	}
+	portOffset := 0
+	portOffsetS := os.Getenv("AUTHENTIK_PORT_OFFSET")
+	if portOffsetS != "" {
+		v, err := strconv.Atoi(portOffsetS)
+		if err != nil {
+			fmt.Println(err.Error())
+		}
+		portOffset = v
+	}
 
 	akURLActual, err := url.Parse(akURL)
 	if err != nil {
@@ -49,7 +60,7 @@ func main() {
 
 	ac := ak.NewAPIController(*akURLActual, akToken)
 
-	ac.Server = proxyv2.NewProxyServer(ac)
+	ac.Server = proxyv2.NewProxyServer(ac, portOffset)
 
 	err = ac.Start()
 	if err != nil {