Add section about proxies

1 job for master in 1 minute and 1 second (queued for 3 seconds)
Status Job ID Name Coverage
  Test
failed #228864
Run tests

00:01:01

 
Name Stage Failure
failed
Run tests Test
E           ValueError: Could not fetch data from URL 'https://api.db.nomics.world/v22//series/BIS/PP-SS?dimensions=%7B%22FREQ%22%3A%5B%22Q%22%5D%2C%22REF_AREA%22%3A%5B%22AU%22%5D%7D&observations=1&offset=0' because: Dataset 'BIS/PP-SS' not found

dbnomics/__init__.py:292: ValueError
=========================== short test summary info ============================
FAILED tests/test_client.py::test_fetch_series_by_api_link - ValueError: Coul...
========================= 1 failed, 18 passed in 4.98s =========================
Running after_script
Uploading artifacts for failed job
ERROR: Job failed: exit code 1