Docker Registry Cleanup Template This template is designed to automatically clean up old image tags in the Docker registry and perform garbage collection. Features List all images in the registry Preserve the last 10 tags for each image (latest tag is always preserved) Delete old tags Email notification for Successful/Excused cancellation Registry garbage collection automation Failure notification in error conditions Prerequisites Docker Registry v2 API access Basic Authentication credentials SMTP email settings (for notifications) SSH node installed on n8n (for garbage collection) Installation 1. Identity Information Add the following credentials in n8n: HTTP Basic Auth**: For Registry access SSH Private Key**: For Garbage collection command Email SMTP**: For notifications 2. Set Variables Replace your-registry-url with your actual registry URL on all nodes: ‘url": ‘https://your.registry.com/v2/_catalog’.
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Generate Custom Branded PDF Invoices from QuickBooks and Email to Clients
Automated QuickBooks Invoice to Custom PDF & Email This n8n workflow automates the entire QuickBooks invoicing process — from creation to delivery. When a new invoice is generated in QuickBooks Online, it automatically fetches the data, applies your company branding, converts it into a professional multi-page PDF via Gotenberg, and emails it directly to your client. Key Features: ⚡ Fully Automated: Triggers instantly on new QuickBooks invoices. 🧾 Custom Branding: Adds your logo and signature from public URLs. 🎨 Modern PDF Design: Clean, professional multi-page layout with smart totals and “Page X of Y” footers. 📧 Automatic Emailing: Sends the final PDF in a formatted email to your customer. Requirements: QuickBooks Online, n8n instance, Gotenberg (HTML→PDF converter), and public URLs for logo/signature.
Monitor website changes with PolyDoc screenshots and email alerts
Quick Overview This workflow checks a website URL every 6 hours, detects content changes by hashing the normalized HTML, and when a change is found it uses PolyDoc to capture a full-page screenshot and emails the PNG as an attachment. How it works Runs every 6 hours on a schedule. Sets the target URL to monitor and fetches the page HTML with an HTTP request. Normalizes the HTML (removing scripts/styles/comments), hashes it, and compares it with the previous run stored in workflow static data. If the hash changed, PolyDoc captures a full-page PNG screenshot of the URL. Sends an email with the screenshot attached and the monitored URL in the subject and body. Setup Update the monitored website URL in the Settings step. Add your PolyDoc API credentials to the PolyDoc screenshot step. Configure an SMTP email credential and set the to/from email addresses in the email step.
Send a daily Microsoft 365 update digest with OpenAI GPT-4o-mini via email
Quick overview This workflow runs daily at 07:00 to pull the latest Microsoft 365, Security & Compliance, and Teams blog RSS posts, uses OpenAI (gpt-4o-mini) to triage and format a prioritized HTML digest, and sends the results to your team via SMTP email. How it works Runs every day at 07:00 on a schedule. Fetches RSS XML from three Microsoft Tech Community feeds (Microsoft 365 Blog, Security & Compliance, and Teams/Microsoft Teams Blog) in parallel. Parses the RSS items, keeps only posts from the last 24 hours, and deduplicates updates by title across all feeds. If no new items are found, sends a “no new updates” email via SMTP. If new items are found, aggregates them into a single formatted list for analysis. Sends the aggregated updates to the OpenAI Chat Completions API (gpt-4o-mini) to assign priority/category/action-required and generate an inline-CSS HTML email body. Emails the generated HTML digest to the configured recipients via SMTP. Setup Create an OpenAI API key and add an HTTP Header Auth credential that sets Authorization: Bearer for the OpenAI request. Add an SMTP credential for the email-sending nodes. Update the fromEmail and toEmail fields in both email actions