Use main image built in core repo

[cedricziel]

Instead of building a new one, we can reference the one that's already being built.

[codecov]

Codecov Report

Merging #144 (a471ae9) into main (f897e94) will not change coverage.
The diff coverage is n/a.

❗ Current head a471ae9 differs from pull request most recent head e5213a9. Consider uploading reports for the commit e5213a9 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #144   +/-   ##
=========================================
  Coverage     25.03%   25.03%           
  Complexity      315      315           
=========================================
  Files            32       32           
  Lines          1306     1306           
=========================================
  Hits            327      327           
  Misses          979      979           

Flag	Coverage Δ
7.4	72.04% <ø> (ø)
8.0	29.34% <ø> (ø)
8.1	29.43% <ø> (ø)
8.2	25.05% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f897e94...e5213a9. Read the comment docs.