Can't develop the ui

[Tchoupinax]

Hello,

I wanted to make some contribution about the CSS but when i launched the project it crashed:

あ→ docker-compose up
Starting ui_chartmuseum_1 ... done
Recreating ui_ui_1        ... done
Attaching to ui_chartmuseum_1, ui_ui_1
chartmuseum_1  | 2020-07-06T22:10:43.142Z	DEBUG	Fetching chart list from storage	{"repo": ""}
chartmuseum_1  | 2020-07-06T22:10:43.142Z	DEBUG	No change detected between cache and storage	{"repo": ""}
chartmuseum_1  | 2020-07-06T22:10:43.142Z	INFO	Starting ChartMuseum	{"port": 8080}
ui_1           | 2020/07/06 22:10:43.225 [I]  http server Running on http://:8080
ui_1           | 2020/07/06 22:10:44.912  I'm alive
ui_1           | 2020/07/06 22:10:44.912  Getting charts on url: /api/charts
ui_1           | 2020/07/06 22:10:44.912  0x8dc5b0
ui_1           | 2020/07/06 22:10:44.912 [C]  the request url is  /
ui_1           | 2020/07/06 22:10:44.912 [C]  Handler crashed with error 0x8dc5b0
ui_1           | 2020/07/06 22:10:44.912 [C]  /usr/local/go/src/runtime/panic.go:969
ui_1           | 2020/07/06 22:10:44.912 [C]  /usr/local/go/src/log/log.go:221
ui_1           | 2020/07/06 22:10:44.912 [C]  /go/src/github.com/chartmuseum/ui/controllers/chartmuseum.go:21
ui_1           | 2020/07/06 22:10:44.912 [C]  /go/src/github.com/chartmuseum/ui/controllers/main.go:17
ui_1           | 2020/07/06 22:10:44.912 [C]  /go/src/github.com/chartmuseum/ui/vendor/github.com/astaxie/beego/router.go:829
ui_1           | 2020/07/06 22:10:44.912 [C]  /usr/local/go/src/net/http/server.go:2807
ui_1           | 2020/07/06 22:10:44.912 [C]  /usr/local/go/src/net/http/server.go:1895
ui_1           | 2020/07/06 22:10:44.912 [C]  /usr/local/go/src/runtime/asm_amd64.s:1373

Moreover, when i wanted to launch server with go run main.go, i had this error:

あ→ go run main.go 
/tmp/go-build701212469/b001/exe/main flag redefined: graceful
panic: /tmp/go-build701212469/b001/exe/main flag redefined: graceful

goroutine 1 [running]:
flag.(*FlagSet).Var(0xc00006a2a0, 0xcf65e0, 0x122f0a9, 0xbeff81, 0x8, 0xc04886, 0x21)
	/usr/lib/go/src/flag/flag.go:851 +0x4b8
flag.BoolVar(...)
	/usr/lib/go/src/flag/flag.go:630
github.com/astaxie/beego/grace.init.0()
	/home/user/go/src/github.com/astaxie/beego/grace/grace.go:93 +0x7a
exit status 2

I tried to remove go dependancies, reinstall them but no success. :( This project does not want i help it xD

What is my problem ? ^^