adding a dockerignore file to ignore gha-credentials #804

All 2 563 tests pass, 74 skipped in 3m 21s

      5 files ±0   363 suites ±0 3m 21s ⏱️ +13s
2 637 tests ±0 2 563 ✔️ ±0 74 💤 ±0 0 ❌ ±0
2 651 runs ±0 2 575 ✔️ ±0 76 💤 ±0 0 ❌ ±0

Results for commit b67f5a3. ± Comparison against earlier commit 8bf7b7c.