minimal docker image aprox 3mb

server.go

@@ -1,28 +1,34 @@
 package main
 
 import (
-	"github.com/armon/go-socks5"
-	"os"
+	"fmt"
 	"log"
+	"os"
+
+	"github.com/armon/go-socks5"
 )
 
 func main() {
-	creds := socks5.StaticCredentials{
-		os.Getenv("PROXY_USER"):os.Getenv("PROXY_PASSWORD"),
-	}
-	cator := socks5.UserPassAuthenticator{Credentials: creds}
-	// Create a SOCKS5 server
+
 	conf := &socks5.Config{
-		AuthMethods: []socks5.Authenticator{cator},
-		Logger:      log.New(os.Stdout, "", log.LstdFlags),
-	}
-	server, err := socks5.New(conf)
-	if err != nil {
-		panic(err)
+		Logger: log.New(os.Stdout, "", log.LstdFlags),
 	}
 
-	// Create SOCKS5 proxy on localhost port 8000
-	if err := server.ListenAndServe("tcp", "0.0.0.0:1080"); err != nil {
-		panic(err)
+	if os.Getenv("PROXY_USER")+os.Getenv("PROXY_PASSWORD") != "" {
+		creds := socks5.StaticCredentials{
+			os.Getenv("PROXY_USER"): os.Getenv("PROXY_PASSWORD"),
+		}
+		cator := socks5.UserPassAuthenticator{Credentials: creds}
+		conf.AuthMethods = []socks5.Authenticator{cator}
 	}
-}
+
+	server, err := socks5.New(conf)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Println("Start listening ...")
+	if err := server.ListenAndServe("tcp", ":1080"); err != nil {
+		log.Fatal(err)
+	}
+}