docs: Document HTTP proxy configuration for Edge Proxy #10422

Job	Run time
Check actor permissions	7s
Add Conventional Commit labels	5s
Prepare Docker report comment	10s
Build Unified Image / Build and verify flagsmith image	2m 16s
Build Frontend Image / Build and verify flagsmith-frontend image	1m 33s
Build API Image / Build and verify flagsmith-api image	1m 41s
Build API Test Image / Build flagsmith-api-test image	42s
Build E2E Image / Build flagsmith-e2e image	48s
Build Private Cloud Image / Build and verify flagsmith-private-cloud image	2m 24s
run-e2e-tests (ARM64-2c, versioning, 1) / E2E: versioning	5m 9s
run-e2e-tests (ARM64-2c, segment-part-2, 1) / E2E: segment-part-2	6m 18s
run-e2e-tests (ARM64-2c, segment-part-3 signup flag invite project, 2) / E2E: segment-part-3 signup flag invite project	6m 5s
run-e2e-tests (ARM64-2c, segment-part-1 environment, 1) / E2E: segment-part-1 environment	5m 44s
run-e2e-tests (ubuntu-latest, segment-part-2, 1) / E2E: segment-part-2	4m 57s
run-e2e-tests (ubuntu-latest, segment-part-3 signup flag invite project, 2) / E2E: segment-part-3 signup flag invite project	4m 32s
run-e2e-tests (ubuntu-latest, segment-part-1 environment, 1) / E2E: segment-part-1 environment	4m 18s
run-e2e-tests (ubuntu-latest, versioning, 1) / E2E: versioning	3m 41s
	50m 30s

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