fix: resolve local redis and docker build errors

[rbarbazz]

I encountered a couple of issues when running the app locally, which this PR addresses:

1. Fix for MacBook M1 build issue (commit: 81dbcca, closes #3315):

   • On a MacBook Air M1 8GB, I ran into the issue described in ERROR [api builder 23/26] RUN yarn workspace @omnivore/api build  #3315. This commit resolves it.
   • The change mirrors an existing step in the runner stage, so it should not affect the current build pipeline.

2. Fix for Redis connection error (commit: f7ae2a4):

   • While running docker compose up api content-fetch, I encountered this error:

     omnivore-api            | [ioredis] Unhandled error event: Error: connect ENOENT %27redis://redis:6379%27
     omnivore-api            |     at PipeConnectWrap.afterConnect [as oncomplete] (node:net:1494:16)

   • Removing the single quotes around the default REDIS_URL fixed the issue.
     Edit: I just noticed there's already another PR that implements this fix fix: Quoted redis url in compose causing error #4378, happy to revert.

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