Add local network Docker Compose harness

[chrypnotoad]

Summary

Adds a manually runnable Docker Compose local Liberdus network path so Playwright can run against a local web client instead of only https://liberdus.com/dev/.

Key additions:

• Manual GitHub Actions smoke workflow for the local network.
• Docker image and Compose service for server + proxy + web-client.
• JS startup entrypoint for readable local-network orchestration.
• Docker healthcheck for readiness.
• Tagged @smoke Playwright command for smoke-only runs.
• Short local-network documentation.

How It Works

The workflow is workflow_dispatch only in this repo. It checks out server, liberdus-proxy, and web-client-v2 into .deps/, builds the local-network image in its own step, starts the container, prints concise startup phases and healthcheck readiness reasons while waiting, then runs the tagged Playwright smoke tests against http://127.0.0.1:8080/.

scripts/local-network/start.js copies the mounted repos into a writable Docker volume, writes local proxy/web config, reuses cached builds when possible, starts a 10-node Shardus network with shardus start, waits for processing, starts liberdus-proxy, writes network.js, and serves the web client.

Playwright still defaults to https://liberdus.com/dev/ unless PLAYWRIGHT_BASE_URL or BASE_URL is set. Global setup now requires the modern network params (stabilityFactorStr, transactionFeeUsdStr, and minTollUsdStr) and fails fast if they are missing.

Validation

Latest validation:

• node -e "require('./helpers/global-setup')({ use: { baseURL: 'https://liberdus.com/dev/' } })..." -> passed against dev network
• npm test -- --list --grep '@smoke' -> 7 tests in 2 files
• git diff --check -> passed

Previously validated during this PR:

• node --check scripts/local-network/start.js
• bash -n scripts/local-network/healthcheck.sh
• docker compose -f docker-compose.local.yml config --quiet
• actionlint via rhysd/actionlint
• Dev-network smoke with default base URL unset before broadening smoke tags: npm run test:smoke -- --workers=1 --retries=0 --reporter=line -> 1 passed (26.2s)
• Docker Compose startup reached healthy
• Playwright smoke passed against JS startup: 1 passed (21.0s)
• Manual GitHub workflow run passed on commit dbf5259
• Earlier act --bind workflow run passed before the JS startup port: 1 passed (30.7s)

Notes

• This PR does not change web-client-v2; wiring this into that repo can happen after this local-network PR lands.
• The verified proxy checkout is new-nodelist-response because current proxy main stalls on the local archiver nodelist response.
• The stack defaults to 10 nodes. A 5-node stack can start, but account creation has hung in prior testing.
• The local-network path remains manual-only because startup is still too slow for routine CI.