Add middleware to prefix JupyterHub navbar items with /hub. #3521

Job	Run time
Test Nebari Provider (aws, none)	1m 29s
Test Nebari Provider (aws, github-actions)	1m 10s
Test Nebari Provider (aws, gitlab-ci)	1m 32s
Test Nebari Provider (azure, none)	1m 15s
Test Nebari Provider (azure, github-actions)	1m 4s
Test Nebari Provider (azure, gitlab-ci)	1m 10s
Test Nebari Provider (do, none)	53s
Test Nebari Provider (do, github-actions)	56s
Test Nebari Provider (do, gitlab-ci)	1m 3s
Test Nebari Provider (gcp, none)	1m 28s
Test Nebari Provider (gcp, github-actions)	1m 3s
Test Nebari Provider (gcp, gitlab-ci)	1m 0s
Test Nebari Provider (local, none)	1m 2s
Test Nebari Provider (local, github-actions)	1m 27s
Test Nebari Provider (local, gitlab-ci)	1m 9s
Test Nebari Provider (existing, none)	1m 2s
Test Nebari Provider (existing, github-actions)	1m 1s
Test Nebari Provider (existing, gitlab-ci)	1m 15s
	20m 59s

Provide feedback