How do you deploy and scale web apps?

Deploying and scaling web apps is a crucial aspect of software development, as it directly impacts the user experience and overall performance of the application. Here’s a detailed explanation of the steps involved:

Deployment:

• 1. Choose a deployment strategy: Decide whether to deploy on-premises or use a cloud service provider like AWS, Azure, or Google Cloud.
• 2. Set up servers: Install necessary software and configure your servers to host the app.
• 3. Transfer code: Use tools like Git to push code changes to the server.
• 4. Configure environment: Set up databases, dependencies, and environment variables.
• 5. Launch app: Start the application and ensure it is accessible to users.

Scaling:

• 1. Monitor performance: Use tools like New Relic or Datadog to track resource usage and identify bottlenecks.
• 2. Horizontal scaling: Add more servers to distribute the load across multiple instances.
• 3. Vertical scaling: Upgrade server resources like RAM and CPU to handle increased traffic.
• 4. Load balancing: Use tools like Nginx or HAProxy to evenly distribute incoming traffic.
• 5. Auto-scaling: Set up triggers to automatically increase or decrease server capacity based on demand.