fix: compose issues

[bilbeyt]

I had problems running docker-compose in my MAC and i solved problems with these changes.

1. ui service change: for some reason, safe-wallet-web image has no contract types generated. (afterinstall is failing). I have adapted the command the fix the issue. (afterinstall doesn't generate contract types for typescript safe-wallet-web#2656)
2. As cgw and ui are using different ports and cgw has no enabled cors, i couldnt use compose without setting cors headers for the cgw. (in a different setup for production this might not be a problem so i dont create issue for this nginx change in cgw repo)

[github-actions]

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[bilbeyt]

I have read the CLA Document and I hereby sign the CLA

[Uxio0]

Hi @bilbeyt and thank you very much for your PR. We analyzed your solution but we decided to go with #121, which in our opinion makes configuration easier making UI and services run from the same nginx instance, so there's no CORS issues.

Again, thank you very much for your time.