Add Dockerfile and update .gitignore

Create a new Dockerfile in the `.devcontainer` directory. Update the `.gitignore` file to include `*.lock`, `yarn-error.log`, `*.local`, and `.trunk/`. These changes are necessary for better project organization and to prevent unwanted files from being tracked.

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.gitignore

@@ -27,5 +27,3 @@ out/
 aws/
 # Local configuration files for local development and testing environments (create this yourself if you need it)
 .pre-commit-config.local.yaml
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-tatus