Add context for docker-compose builds since it is necessary for newer versions of Docker.

[lcwik]

Changelist

Add context for docker-compose builds since it is necessary for newer versions of Docker.

Otherwise docker-compose up fails with an error saying build context is required.

Test Plan

Tested locally + existing integration tests

Author/Reviewer Checklist

• If this PR has changes that result in a different app state given the same prior state and transaction list, manually add the state-breaking label.
• If this PR isn't state-breaking but has changes that modify behavior in PrepareProposal or ProcessProposal, manually add the label proposal-breaking.
• If this PR is one of many that implement a specific feature, manually label them all feature:[feature-name].
• If you wish to for mergify-bot to automatically create a PR to backport your change to a release branch, manually add the label backport/[branch-name].
• Manually add any of the following labels: refactor, chore, bug.