fix: set port 8080 visibility to public for Codespaces

Ensures Jenkins port is accessible externally from Codespaces.
Without this, the port defaults to private and connection is refused.

🤖 Generated with Claude Code (https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: gounthar

.devcontainer/devcontainer.json

@@ -21,7 +21,8 @@
     "8080": {
       "label": "Jenkins Controller",
       "onAutoForward": "openPreview",
-      "protocol": "http"
+      "protocol": "http",
+      "visibility": "public"
     },
     "3000": {
       "label": "Application Port (Node/Android/Go)",