Problem with auto provisioning the dashboards

[mstiesto]

Is your feature request related to a problem?

This feature request is related to dashboard provisioning problem. Please describe. I'm attempting to automatically create dashboards during the initial setup of Signoz on Kubernetes clusters. I couldn't find any documentation on this topic, so I'm unsure whether this should be considered a feature request or a bug report. However, I did discover that within the Signoz Query Service, if we place JSON files for dashboards inside the '/root/config/dashboards/' directory, it attempts to read the JSON files and provision the dashboards at startup. Unfortunately, it throws an error when attempting to read these dashboard files: `2023-09-20T09:54:12.504Z INFO dashboards/provision.go:23 Provisioning dashboard: kubernetes-metrics.json panic: interface conversion: interface {} is nil, not string

goroutine 1 [running]: go.signoz.io/signoz/pkg/query-service/app/dashboards.readCurrentDir({0x4000044070, 0x17}, {0x1ce5020, 0x400062e5a0}) /go/src/github.com/signoz/signoz/pkg/query-service/app/dashboards/provision.go:41 +0x52c go.signoz.io/signoz/pkg/query-service/app/dashboards.LoadDashboardFiles({0x1ce5020, 0x400062e5a0}) /go/src/github.com/signoz/signoz/pkg/query-service/app/dashboards/provision.go:59 +0x54 go.signoz.io/signoz/pkg/query-service/app.NewAPIHandler({{0xffff70185c50, 0x40000ec240}, 0x4000780120, 0x1, 0x0, 0x32, 0x64, 0x12a05f200, {0xffff701f3270, 0x400062c1c8}, ...}) /go/src/github.com/signoz/signoz/pkg/query-service/app/http_handler.go:171 +0x488 go.signoz.io/signoz/ee/query-service/app/api.NewAPIHandler({{0x1d06ec8, 0x40000ec240}, 0x4000780120, 0x1, 0x0, 0x32, 0x64, 0x12a05f200, {0x1d05e40, 0x400062c1c8}, ...}) /go/src/github.com/signoz/signoz/ee/query-service/app/api/api.go:46 +0x108 go.signoz.io/signoz/ee/query-service/app.NewServer(0x4000686000) /go/src/github.com/signoz/signoz/ee/query-service/app/server.go:227 +0x4f0 main.main() /go/src/github.com/signoz/signoz/ee/query-service/main.go:142 +0x748`

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Describe alternatives you've considered

For now seems the only way is to create the dashboards manually.

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[Haavasma]

The uuid is not part of the "data" field of a dashboard, and will not be exported when exporting to json file. To comply with provisioning, this "uuid" should be added as a field in the metadata when sharing the dashboard.

I have a fix for this, but not sure where to start for contributing