A. Go Application Hosting (PaaS):
Render.com:
Free Tier: Offers a generous free tier for web services (750 instance hours/month, 100GB bandwidth, 500 build minutes). Pros: Very easy to deploy from Git, supports Go directly, managed environment. Cons: Free web services spin down after inactivity (can cause cold starts), no persistent disk on free tier (not an issue for your stateless Go server). How to: Connect your GitHub repo, select Go, configure build command (go build -o server .) and start command (./server). Set environment variables for REDIS_ADDR.
B. Redis Database Hosting (Managed Free Tier):
Upstash (Recommended for Serverless/Ephemeral): Free Tier: Offers a serverless Redis free tier with 10,000 commands/day, 256MB max dataset size, and 50MB data transfer/day. Perfect for your ephemeral Zapp! data. Pros: Designed for serverless/edge functions, very low latency, easy to set up. Cons: Limits on commands/data transfer, not suitable for very high-volume or large datasets. How to: Sign up, create a new Redis database. You'll get a URL and password to configure in your Go app's REDIS_ADDR environment variable.