* add pre-commit hook configuration

* add tmp.md to .gitignore

* describe the use of pre-commit hook in CONTRIBUTING.md

* fix docs/integration.md errors identified by markdownlint

* fix docs/<file>.md errors identified by markdownlint

* docs/azure-csi.md
* docs/azure.md
* docs/bootstrap-os.md
* docs/calico.md
* docs/debian.md
* docs/fcos.md
* docs/vagrant.md
* docs/gcp-lb.md
* docs/kubernetes-apps/registry.md
* docs/setting-up-your-first-cluster.md
* docs/vagrant.md
* docs/vars.md

* fix contrib/<file>.md errors identified by markdownlint

* Allow configureable vni and port for flannel overlay

* additional options for azure cloud config

Signed-off-by: zouyu <zouy.fnst@cn.fujitsu.com>

As the download page[1], the command name is "az", not "azure". This
replaces "azure" command with "az" command for fixing it.
In addition, "az account list-locations" is correct command line to
know available location as [2].

[1]: https://docs.microsoft.com/en-gb/azure/xplat-cli-install
[2]: https://docs.microsoft.com/en-us/cli/azure/account?view=azure-cli-latest#az-account-list-locations

cloud_provider option exists in ./inventory/sample/group_vars/all/all.yml
In addition, the quick start shows to create configuration by copying
./inventory/sample. So this updates path of all.yml for fitting the above.

https://github.com/colemickens/azure-kubernetes-status is deprecated
and will be removed soon as the README.
So this updates the link to the repository for a new one.

Azure vmss - kubelet: failed to get instance ID from cloud provider: instance not found #5824 (#5855)

* kubernetes-sigs-kubespray #5824

Added support nodes which are part of Virtual Machine Scale Sets(VMSS)

* kubernetes-sigs-kubespray #5824

* kubernetes-sigs-kubespray #5824

Added comments and updatetd azure docs.

* kubernetes-sigs-kubespray #5824

Added supported values comments for "azure_vmtype" in azure.yml

add the support of the folling property in azure-credential-check.yml
  - azure_loadbalancer_sku: Sku of Load Balancer and Public IP. Candidate values are: basic and standard.
  - azure_exclude_master_from_standard_lb: excludes master nodes from standard load balancer.
  - azure_disable_outbound_snat: disables the outbound SNAT for public load balancer rules
  - useInstanceMetadata: Use instance metadata service where possible
  - azure_primary_availability_set: (Optional) The name of the availability set that should be used as the load balancer backend