Improve documentation about azcopy installation requirements for custom Azure Batch worker pools

[adamrtalbot]

The Azure documentation was missing the requirement to install azcopy on each worker pool. This caused some confusion on the community Slack so I decided to update the docs to make it clear that azcopy is required.

Signed-off-by: Adam Talbot 12817534+adamrtalbot@users.noreply.github.com

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[pditommaso]

Hold on, the azcopy is installed as a resource automatically by this

nextflow/plugins/nf-azure/src/main/nextflow/cloud/azure/batch/AzBatchService.groovy

Lines 689 to 691 in 6e022f1

	resourceFiles << new ResourceFile()
	.withHttpUrl(AZCOPY_URL)
	.withFilePath('azcopy')

[adamrtalbot]

Hold on, the azcopy is installed as a resource automatically by this

nextflow/plugins/nf-azure/src/main/nextflow/cloud/azure/batch/AzBatchService.groovy

Lines 689 to 691 in 6e022f1

	resourceFiles << new ResourceFile()
	.withHttpUrl(AZCOPY_URL)
	.withFilePath('azcopy')

That code snippet refers to when Nextflow creates the pool. This refers to manually pointing at an existing Azure Pool (i.e. using process.queue).

[pditommaso]

Ok!