[juleswritescode]

• needed to add some dependencies that we were using but that were transitive deps of other modules
• used the setup action from the platform repo
• changed dockerfile

we're already on node version 26 (see .nvmrc).

tested it by

1. pruning docker cache
2. rebuilding the container, running it
3. verify /health works; synced a random subscription from orb-staging to local db and verified with psql
4. exposed container via ngrok and added webhook URL to orb-staging, verified that subscription.created events arrive

[github-actions]

🎉 This PR is included in version 1.17.2 🎉

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