Production Power-Up: Essential Postinstall Script Secured!

Development Team Ensures Seamless Building Process by Integrating Yarn Postinstall Step in Docker Configuration.

Commit Details:

fix: Ensure we run `yarn postinstall` script for production build (#2089) ## Motivation We were still missing the patch in production. ## Change Summary Ensure we run `postinstall` in production as well. ## Merge Checklist - [x] PR title adheres to the [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/) standard - [ ] PR has a [changeset](https://github.com/farcasterxyz/hub-monorepo/blob/main/CONTRIBUTING.md#35-adding-changesets) - [x] PR has been tagged with a change label(s) (i.e. documentation, feature, bugfix, or chore) - [ ] PR includes [documentation](https://github.com/farcasterxyz/hub-monorepo/blob/main/CONTRIBUTING.md#32-writing-docs) if necessary. - [x] All [commits have been signed](https://github.com/farcasterxyz/hub-monorepo/blob/main/CONTRIBUTING.md#22-signing-commits) ## Additional Context If this is a relatively large or complex change, provide more details here that will help reviewers <!-- start pr-codex --> --- ## PR-Codex overview This PR focuses on optimizing the Docker build process by adding a `yarn postinstall` step after installing production dependencies. ### Detailed summary - Added `yarn postinstall` step after installing production dependencies in the Dockerfile. > ✨ Ask PR-Codex anything about this PR by commenting with `/codex {your question}` <!-- end pr-codex -->