[BUG] All quest 4 exercises piscine/blockchain

[mohaskii]

After submitting exercise 2, I encountered this error:

"before all" hook for "Should get the first account":
     Error: Timeout of 10000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/jail/test/get-account.test.js)
      at listOnTimeout (node:internal/timers:569:17)
      at processTimers (node:internal/timers:512:7)

This indicates that the error is in the test file get-account.test.js. After downloading the latest version of the Docker image, I realized that the issue was with the connection link to the local node:
#2771

However, I also noticed that all exercises in this quest have the same issue!
To fix this, simply replace the connection link with http://0.0.0.0:8545 in all the test files.

A quick correction of this bug would be greatly appreciated, as it's blocking our progress in the piscine.