fix installation page ssh domain unavilable (#506)

Author: lunny

routers/install.go

@@ -241,7 +241,7 @@ func InstallPost(ctx *context.Context, form auth.InstallForm) {
 	cfg.Section("").Key("APP_NAME").SetValue(form.AppName)
 	cfg.Section("repository").Key("ROOT").SetValue(form.RepoRootPath)
 	cfg.Section("").Key("RUN_USER").SetValue(form.RunUser)
-	cfg.Section("server").Key("DOMAIN").SetValue(form.Domain)
+	cfg.Section("server").Key("SSH_DOMAIN").SetValue(form.Domain)
 	cfg.Section("server").Key("HTTP_PORT").SetValue(form.HTTPPort)
 	cfg.Section("server").Key("ROOT_URL").SetValue(form.AppURL)