Should not specifying web-public-dir with concourse web automatically create the directory and files?

[NorseGaud]

Summary

On macos running concourse web doesn't seem to work. I get a white page loading 8080 and an error like

❯ concourse web
{"timestamp":"2024-02-08T14:54:27.847339000Z","level":"info","source":"atc","message":"atc.cmd.start","data":{"session":"1"}}
{"timestamp":"2024-02-08T14:54:28.036180000Z","level":"info","source":"atc","message":"atc.tracker-imb.start","data":{"session":"22"}}
{"timestamp":"2024-02-08T14:54:28.048894000Z","level":"info","source":"atc","message":"atc.cmd.finish","data":{"duration":2098958,"session":"1"}}
{"timestamp":"2024-02-08T14:54:28.052577000Z","level":"info","source":"tsa","message":"tsa.listening","data":{}}
{"timestamp":"2024-02-08T14:54:28.052918000Z","level":"info","source":"atc","message":"atc.listening","data":{"debug":"127.0.0.1:8079","http":"0.0.0.0:8080"}}
{"timestamp":"2024-02-08T14:54:32.410139000Z","level":"error","source":"atc","message":"atc.index.failed-to-build-template","data":{"error":"template: index.html:8:63: executing \"index.html\" at \u003casset \"main.css\"\u003e: error calling asset: open main.css: file does not exist","session":"44"}}
2024/02/08 09:54:32 http: superfluous response.WriteHeader call from github.com/felixge/httpsnoop.(*Metrics).CaptureMetrics.func1.1 (capture_metrics.go:53)
{"timestamp":"2024-02-08T14:54:32.434224000Z","level":"error","source":"atc","message":"atc.index.failed-to-build-template","data":{"error":"template: index.html:8:63: executing \"index.html\" at \u003casset \"main.css\"\u003e: error calling asset: open main.css: file does not exist","session":"47"}}
2024/02/08 09:54:32 http: superfluous response.WriteHeader call from github.com/felixge/httpsnoop.(*Metrics).CaptureMetrics.func1.1 (capture_metrics.go:53)
{"timestamp":"2024-02-08T14:54:38.087693000Z","level":"info","source":"atc","message":"atc.scanner.tick.start","data":{"session":"23.2"}}
{"timestamp":"2024-02-08T14:54:38.094703000Z","level":"info","source":"atc","message":"atc.scanner.tick.end","data":{"session":"23.2"}}

Shouldn't this directory be created in the current directory if not specified with --web-public-dir= ?

Related: #7597

Steps to reproduce

Get latest darwin binary, go through the getting started tutorial, and launch with concourse web

Expected results

Web UI loads.

Actual results

White UI and errors in logs.

Triaging info

❯ concourse --version
7.11.2

• Browser (if applicable): N/A

[NorseGaud]

Even specifying the location with that flag doesn't work

❯ ll concourse-public
total 0

❯ concourse web --web-public-dir=/Users/m1mini/concourse-public
{"timestamp":"2024-02-08T15:23:40.898385000Z","level":"info","source":"atc","message":"atc.cmd.start","data":{"session":"1"}}
{"timestamp":"2024-02-08T15:23:41.082969000Z","level":"info","source":"atc","message":"atc.tracker-imb.start","data":{"session":"22"}}
{"timestamp":"2024-02-08T15:23:41.096816000Z","level":"info","source":"atc","message":"atc.cmd.finish","data":{"duration":2038209,"session":"1"}}
{"timestamp":"2024-02-08T15:23:41.100758000Z","level":"info","source":"tsa","message":"tsa.listening","data":{}}
{"timestamp":"2024-02-08T15:23:41.101736000Z","level":"info","source":"atc","message":"atc.listening","data":{"debug":"127.0.0.1:8079","http":"0.0.0.0:8080"}}
{"timestamp":"2024-02-08T15:23:43.909570000Z","level":"error","source":"atc","message":"atc.index.failed-to-parse-templates","data":{"error":"template: pattern matches no files: `index.html`","session":"44"}}

[slimeandsoakem]

I found that the docker build neglected the npm phases -
Using the main concourse git repo, run these steps first to get the css's compiled

npm install
npm install -g yarn
npm run build