cli can pass -p 10_000

src/server/config.go

@@ -1,14 +1,18 @@
 package server
 
 import (
-	"os"
-	"strconv"
+	"context"
 )
 
-var Port = func() int {
-	port, _ := strconv.Atoi(os.Getenv("PORT"))
-	if port == 0 {
-		port = 10000
+func Inject(ctx context.Context, port int) context.Context {
+	return context.WithValue(ctx, "server.port", port)
+}
+
+func Extract(ctx context.Context) int {
+	v := ctx.Value("server.port")
+	port, ok := v.(int)
+	if !ok {
+		return 10_000
 	}
 	return port
-}()
+}