Third-party nodes not loading when Dashboard hosted on proxy

[joepavitt]

Current Behavior

Details: https://discourse.nodered.org/t/d2-third-party-nodes-do-not-appear-blocked-due-to-forbidden-mime-text-html/88916

Reported error:

/resources/@colinl/node-red-dashboard-2-ui-gauge-classic/ui-gauge-classic.umd.js” zostało zablokowane z powodu niedozwolonego typu MIME („text/html”).`

I suspect we have a hardcoded path when loading third-party nodes

Expected Behavior

Third party widgets should be loading as core nodes do.

Steps To Reproduce

• Will need to setup an nginx proxy
• Install a third-party widget

Environment

• Dashboard version:
• Node-RED version:
• Node.js version:
• npm version:
• Platform/OS:
• Browser:

Have you provided an initial effort estimate for this issue?

I have provided an initial effort estimate

[colinl]

For the record, I use Cloudflare Zero Trust as a proxy and I don't see the problem there.

[joepavitt]

Link to an nginx config we've had working locally before: https://github.com/FlowFuse/node-red-dashboard/issues/526#issuecomment-1956334415

[joepavitt]

Other reporting that it works okay with nginx, and that Docker may be the problem: https://discourse.nodered.org/t/d2-third-party-nodes-do-not-appear-blocked-due-to-forbidden-mime-text-html/88916/8?u=joepavitt

[colinl]

See also #1615 which I think may hold the answer, or at least part of it.