Add ProxyFromEnvironment in downloadFile method

[Lichmaker]

Description

Add ProxyFromEnvironment in downloadFile method.

Issue reference

Please reference the issue this PR will close: #1043

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• [x] Code compiles correctly
• [ ] Created/updated tests
• [ ] Extended the documentation

[pravinpushkar]

@Lichmaker Could you please check the lint failures.

[codecov[bot]]

Codecov Report

Merging #1048 (4b488b9) into master (5a28708) will decrease coverage by 0.11%. The diff coverage is 9.52%.

@@            Coverage Diff             @@
##           master    #1048      +/-   ##
==========================================
- Coverage   29.24%   29.13%   -0.12%     
==========================================
  Files          35       35              
  Lines        2342     2358      +16     
==========================================
+ Hits          685      687       +2     
- Misses       1582     1595      +13     
- Partials       75       76       +1     

Impacted Files	Coverage Δ
pkg/kubernetes/kubernetes.go	0.00% <0.00%> (ø)
pkg/standalone/standalone.go	4.49% <0.00%> (-0.06%)	:arrow_down:
pkg/kubernetes/upgrade.go	20.22% <50.00%> (+1.40%)	:arrow_up:

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[Lichmaker]

@pravinpushkar Glad to do it. Please check it. 😃 https://github.com/dapr/cli/pull/1049

[mukundansundar]

@Lichmaker Can you please create a docs PR on how to use this ? Potentially add it in this page? https://docs.dapr.io/operations/troubleshooting/common_issues/ cc @greenie-msft WDYT?

[Lichmaker]

@Lichmaker Can you please create a docs PR on how to use this ? Potentially add it in this page? https://docs.dapr.io/operations/troubleshooting/common_issues/ cc @greenie-msft WDYT?

OK 😃 I'll try

[mukundansundar]

@Lichmaker Thanks for the change to include docs PR !!