postline 0.3.0

See it before it ships, and hear about problems before a post fails.

• postline preview: a local page per post with the card, lint results and each channel's text the way that network will show it: length against the limit, highlighted links and hashtags, where LinkedIn folds behind "see more", the webhook payload and the files channel's Markdown. Reloads on save
• Pull request previews: a GitHub Action (uses: 1cbyc/postline@v0.3.0) that comments the changed posts' rendered cards, per-channel lengths and lint results on pull requests that change posts, kept up to date on every push. Lint errors in other posts still fail the check. postline init workflows use it. postline pr-report produces the same report locally
• postline doctor: checks the config, lint, drafts due soon, Chromium, each channel's secrets and login, LinkedIn API version age and token expiry, stuck ledger entries, stale locks and the workflow's postline version
• Alerts: notify: sends failed, uncertain and blocked sends and doctor errors and warnings to Slack, Discord, ntfy or a signed JSON endpoint, at most once a day per problem, even when it repeats every run
• The daemon runs doctor once a day, even when publishing fails, and sends its errors and warnings, including the 14-day token-expiry warning
• LinkedIn channels accept tokenExpires: so doctor can warn 14 days before the token stops working

Install: npm install --global postline@0.3.0
Pull request previews: uses: 1cbyc/postline@v0.3.0
Docs: https://postline.nsisong.com/docs/previews/ and https://postline.nsisong.com/docs/health-and-alerts/