[Merged by Bors] - Allow specifying alternative url for deposit_contract #2295
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Issue Addressed
None
Proposed Changes
Adds support for downloading the deposit contract from a different location
by setting the environement variables
LIGHTHOUSE_DEPOSIT_CONTRACT_SPEC_URL
and
LIGHTHOUSE_DEPOSIT_CONTRACT_TESTNET_URL
.It also adds support to fetch the content from a local file:// URL.
This allows pre fetching to build in an environment without network access.
Additional Info
Being able to build without network access is required to package the application for https://nixos.org/. But I imagine it might be useful for other distributions too.