Production asset loading

[davecoates]

Review asset loading so that frontend dir can be excluded from deployed images.

Default setting in template reads from

"PRODUCTION_DIR": PROJECT_DIR / "frontend/build",

should be

"PRODUCTION_DIR": STATIC_ROOT / FRONTEND_PRODUCTION_STATIC_PREFIX,

so can work without frontend/build

Review other assets loaded via python that may require frontend dir be included in deployed image.

• permissionManifest.json
• manifest.json

This may cross alliance-platform-js (vite plugins), alliance-platform-py and template project settings.