Start blog post describing release process

[abailly-iohk]

fix #500

We should probably write the whole release process as a RELEASE.md document at the toplevel of the repository

[github-actions[bot]]

Unit Test Results

  2 files   -     5    4 suites   - 20   0s :stopwatch: - 2m 18s 16 tests  - 321  16 :heavy_check_mark:  - 321  0 :zzz: ±0  0 :x: ±0  16 runs   - 322  16 :heavy_check_mark:  - 322  0 :zzz: ±0  0 :x: ±0 

Results for commit 1ff96a74. ± Comparison against base commit 593a9ec8.

This pull request removes 321 tests.

aggregator::tests ‑ get_certificate_details_ko_404
aggregator::tests ‑ get_certificate_details_ko_500
aggregator::tests ‑ get_certificate_details_ko_unreachable
aggregator::tests ‑ get_certificate_details_ok
aggregator::tests ‑ get_download_snapshot_ko_500
aggregator::tests ‑ get_download_snapshot_ko_unreachable
aggregator::tests ‑ get_download_snapshot_ok
aggregator::tests ‑ get_snapshot_details_ko_404
aggregator::tests ‑ get_snapshot_details_ko_500
aggregator::tests ‑ get_snapshot_details_ko_unreachable
…