**Tags:** "Hello World" Examples · React # React (Vite) Static Hello World A complete [React](https://react.dev) + [Vite](https://vite.dev) hello world recipe for [Zerops](https://zerops.io), demonstrating static site deployment with build-time environment variable injection — compiled by Node.js, served by Nginx, ready-made for every stage of the development lifecycle. ### Available Environments - [AI Agent](https://app.zerops.io/recipes/react-static-hello-world.md?environment=ai-agent) - [Remote (CDE)](https://app.zerops.io/recipes/react-static-hello-world.md?environment=remote-cde) - [Local](https://app.zerops.io/recipes/react-static-hello-world.md?environment=local) - [Stage](https://app.zerops.io/recipes/react-static-hello-world.md?environment=stage) - **Small Production** ← current - [Highly-available Production](https://app.zerops.io/recipes/react-static-hello-world.md?environment=highly-available-production) ### Services in this Environment **Services:** - **core** (core@1) - Containers: 1 × Shared Core, 0.00 GB RAM, 0 GB Disk - **app** (static) - Containers: 2 × Shared Core, 0.38 GB RAM, 1 GB Disk - Repository: [zerops-recipe-apps/react-static-hello-world-app](https://github.com/zerops-recipe-apps/react-static-hello-world-app) **Total Resources:** 3 containers, 0.75 GB RAM, 2 GB Disk ### One-Click Deploy (Import YAML) Use this YAML with `zcli project import` to deploy this environment: ```yaml # React Hello World — Small Production Environment # # Production-ready setup optimized for moderate throughput. Two Nginx # containers run behind the project balancer at all times, providing # redundancy and absorbing traffic spikes without cold-start delays. project: name: react-static-hello-world-small-prod services: - hostname: app type: static zeropsSetup: prod # Zerops pulls source code and zerops.yaml from this public repo, # then triggers the build/deploy pipeline automatically. buildFromGit: https://github.com/zerops-recipe-apps/react-static-hello-world-app enableSubdomainAccess: true # Always run at least 2 containers — distributes traffic and ensures # the app stays available during zero-downtime deploys while new # containers start alongside old ones before the traffic switch. minContainers: 2 verticalAutoscaling: # Production RAM floor — enough headroom for Nginx workers and # simultaneous connections. Zerops auto-scales up under load. minRam: 0.25 # Reserve free RAM so burst traffic doesn't cause OOM restarts. minFreeRamGB: 0.125 ``` --- ## Next Steps After deploying one of the environments and getting to know Zerops, you have two paths to choose from: 1. **Template Flow** — Clone our GitHub repositories and use the whole recipe as a template 2. **Integrate Flow** — If you already have an existing application on a similar stack, integrate the recipe setup with your application Select a flow: [Template Flow](https://app.zerops.io/recipes/react-static-hello-world.md?environment=small-production&guideFlow=template) or [Integrate Flow](https://app.zerops.io/recipes/react-static-hello-world.md?environment=small-production&guideFlow=integrate) Both flows are shown below: ## How to take over the Small Production environment ### 📦 Clone the template repositories Fork or clone the following repositories to your local machine or GitHub account: - [zerops-recipe-apps/react-static-hello-world-app](https://github.com/zerops-recipe-apps/react-static-hello-world-app) ### 1. Find your service name Many commands and configurations need the exact name of your service. You can find it in the Zerops Dashboard. - Open your project in the Zerops Dashboard. - In the project overview, find the service you want to manage. - Use this exact name whenever a command or pipeline configuration asks for ``. Zerops GUI: Locating the Service Name ### 2. Configure deployment pipeline Go to Service Settings > Pipelines & CI/CD Settings in the Zerops Dashboard and connect your repository. For production, use a trigger on new tags. This keeps deployments intentional and tied to a specific version. You can also add a regex filter, such as `^v[0-9]+\.[0-9]+\.[0-9]+$`, if you want to allow only semantic version tags. Zerops GUI: Triggers Alternatively, add `zcli push` to your existing CI/CD pipeline if you want full control over when deployments happen. Learn more about pipeline triggers: https://docs.zerops.io/features/pipeline ### 3. Deploy to production Create and push a new Git tag to deploy a specific version of your app: ```bash git tag -a v1.0.0 -m "Release version 1.0.0" git push origin v1.0.0 ``` > [!TIP] > Open the pipeline detail in the Zerops Dashboard to check the build progress and verify that all steps finish successfully. ### 4. Configure autoscaling Review the autoscaling settings for your runtime services and databases in Service Settings > Automatic Scaling Configuration in the Zerops Dashboard. Zerops GUI: Autoscaling configuration The most important settings are: ```yaml verticalAutoscaling: minRam: 1 minFreeRamGB: 0.5 minFreeRamPercent: 20 ``` > [!CAUTION] > Pay attention to `minFreeRamGB`. This value tells Zerops when to scale RAM vertically. Adjust it based on your app’s real memory needs. RAM scales up immediately, while CPU scales after two consecutive measurements below the threshold. > [!TIP] > Run a quick stress test with a tool like hey before real users arrive. This helps you see how your app behaves under load and tune the autoscaling settings. ### 5. Set up your domain To send real traffic to your app, configure public HTTP access in Service Settings > Public Access & Internal Ports in the Zerops Dashboard. Add your custom domain and point your DNS records to the Zerops IPs shown in the dashboard: Zerops GUI: Public access and custom domain ```text Type Name Content TTL A example.com Auto AAAA example.com Auto ``` For wildcard domains, add a CNAME record for SSL validation. Check the public access documentation: https://docs.zerops.io/features/access > [!TIP] > When changing DNS records for production, start with a low TTL value. Make sure SSL certificates are active before you disable the fallback Zerops subdomain. Once everything works, you can disable the Zerops subdomain so all traffic goes through your custom domain. --- ### 🎉 You are good to go! Your application is live in production and the core setup is complete. The following sections are optional. They cover extra production features such as log forwarding, backups, and diagnostic access. You can stop here and come back later when you need them. --- ### 6. Set up log forwarding (Optional) To send logs to an external service, go to Project Settings > Log Forwarding & Logs Overview in the Zerops Dashboard. You can forward logs to services like Better Stack, Papertrail, or your own self-hosted solution. Learn more about log forwarding: https://docs.zerops.io/references/logging ### 7. Configure database backups (Optional) Manage automated encrypted backups in Service Settings > Backups in the Zerops Dashboard. By default, backups run daily between 00:00 and 01:00 UTC. Before a major deployment, create a manual protected backup: ```bash zcli backup create --tags pre-deploy,protected ``` Read the backup documentation for more options: https://docs.zerops.io/features/backup ### 8. Set up diagnostic access (Optional) Use zCLI and VPN access when you need to inspect or maintain services directly. For runtime services: ```bash zcli vpn up ssh .zerops ``` For databases, connect through the VPN to reach the project’s private network, or set up secure direct IP access for your database admin tools. Check the VPN documentation: https://docs.zerops.io/references/cli/commands#vpn-up ## How to integrate app with Zerops ### 1. Adding `zerops.yaml` The main application configuration file you place at the root of your repository, it tells Zerops how to build, deploy and run your application. ```yaml # zerops.yaml — React (Vite) Hello World # Two setups: 'prod' for optimized static builds, 'dev' for SSH development. zerops: # Production / Stage - setup: prod build: # Build with Node.js (npm/npx), serve with Nginx. # The build container compiles the React app into static HTML/CSS/JS # — Node.js is NOT present at runtime. base: nodejs@22 # Bake the environment name into the JS bundle at build time. # Static deployments have no runtime process, so all env config must # be injected here. VITE_* vars are exposed to client code by Vite. # Zerops RUNTIME_ prefix pattern: a runtime var FOO is also readable # as RUNTIME_FOO during build — useful for promoting stage vars to prod # without code changes. envVariables: VITE_APP_ENV: production buildCommands: # npm install (not npm ci) — the build container runs Alpine Linux; # Vite's native Rollup binaries are platform-specific, so letting # npm resolve the correct musl binary is required here. - npm install - npm run build # Strip 'dist/' prefix — contents become the Nginx document root, # so dist/index.html becomes /index.html. deployFiles: - dist/~ cache: - node_modules run: # Nginx serves the compiled output — no Node.js at runtime. # Built-in SPA fallback: unmatched routes serve /index.html, # so React Router and other client-side routers work out of the box. base: static # Development (SSH workspace) - setup: dev build: base: nodejs@22 os: ubuntu buildCommands: # Install all deps (including devDeps) — the developer will run # 'npm run dev' or other scripts via SSH after deployment. - npm install # Deploy full source tree so the developer has everything in place. deployFiles: ./ cache: - node_modules run: # Node.js runtime so the developer can run 'npm run dev' via SSH. # Nginx is NOT used here — the Vite dev server handles requests. base: nodejs@22 os: ubuntu # Keep the container alive without starting any server. # The developer SSHs in and starts their own dev server. start: zsc noop --silent ``` ### 🎯 What's next? **Deploy other environments** — Ready to scale? Deploy additional environments for different stages of your workflow: - [AI Agent](https://app.zerops.io/recipes/react-static-hello-world.md?environment=ai-agent) - [Remote (CDE)](https://app.zerops.io/recipes/react-static-hello-world.md?environment=remote-cde) - [Local](https://app.zerops.io/recipes/react-static-hello-world.md?environment=local) - [Stage](https://app.zerops.io/recipes/react-static-hello-world.md?environment=stage) - [Highly-available Production](https://app.zerops.io/recipes/react-static-hello-world.md?environment=highly-available-production) ## Knowledge Base ### Platform Reference - [Routing & Domains](https://docs.zerops.io/features/access) - [Scaling](https://docs.zerops.io/features/scaling) - [Environment Variables](https://docs.zerops.io/features/env-variables) - [CLI (zcli)](https://docs.zerops.io/references/cli) ### Service Type Reference **Static** - [Configuration](https://docs.zerops.io/static/overview#routing-configuration) - [SEO Setup](https://docs.zerops.io/static/overview#seo-with-prerender) - [Frameworks](https://docs.zerops.io/static/overview#framework-integration) --- ## Related Recipes - [React Router SSR Hello World](https://app.zerops.io/recipes/react-router-ssr-hello-world.md) - [React Router Static Hello World](https://app.zerops.io/recipes/react-router-static-hello-world.md) - [Bun Hello World](https://app.zerops.io/recipes/bun-hello-world.md) - [Go Hello World](https://app.zerops.io/recipes/go-hello-world.md)