Update filter gateway document

[vankichi]

Signed-off-by: vankichi kyukawa315@gmail.com

Description:

I have updated the filter gateway document.

• add ingress filtering description
• add egress filtering description

Related Issue:

How Has This Been Tested?:

Environment:

• Go Version: 1.18.3
• Docker Version: 20.10.8
• Kubernetes Version: 1.22.0
• NGT Version: 1.14.6

Types of changes:

• Bug fix [type/bug]
• New feature [type/feature]
• Add tests [type/test]
• Security related changes [type/security]
• Add documents [type/documentation]
• Refactoring [type/refactoring]
• Update dependencies [type/dependency]
• Update benchmarks and performances [type/bench]
• Update CI [type/ci]

Changes to Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully ran tests with your changes locally?

Checklist:

• I have read the CONTRIBUTING document.
• I have checked open Pull Requests for the similar feature or fixes?
• I have added tests and benchmarks to cover my changes.
• I have ensured all new and existing tests passed.
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly.

[vdaas-ci]

[CHATOPS:HELP] ChatOps commands.

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• ⏪ /rebase - rebase master
• 🔚 2️⃣ 🔚 /label actions/e2e-deploy - run E2E deploy & integration test

[taisuou]

Looks good! but fixing the flowing details will make the image better.

In the egress filtering image

Put the block of Serch request within a left line.

The text of No.7,Pass the aggregated 〜 shoud be align left.

sorry for the detailed comments.

[kevindiu]

On the ingress filter diagram, no. 6, I think it is better to specify the request passing is filtered request.
Pass the filtered request

[hlts2]

LGTM!

[taisuou]

Sorry for the late reply.
I modified each image.

[hlts2]

LGTM