Custom domains, HTTPS, Docker and DNS tips for a clean local development setup.
Use subdomains on localhost: the free *.localhost trick browsers resolve automatically, fixed subdomains via the hosts file, and wildcard subdomains with dnsmasq on Mac and Linux.
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0.0.0.0 vs 127.0.0.1 explained: 127.0.0.1 is loopback-only, while 0.0.0.0 binds to all interfaces. When to use each for local servers, Docker and security.
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Which TLD to use for local development: prefer .test, avoid .dev and .local. Why .test is reserved, how to map it in the hosts file, and HTTPS tips.
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What is localhost? It is the hostname for your own computer, resolving to 127.0.0.1 (or ::1) via the hosts file. How it works, why it matters, and common issues.
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The hosts file does not support wildcards like *.myapp.test. Learn why, and how to set up wildcard local domains with dnsmasq on macOS and Linux.
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Manage hosts file configurations for dev, staging and production. Switch project setups, version configs and streamline team workflows.
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Configure hosts files for Docker, docker-compose and container networking. Map services to local domains and simplify Mac development.
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Share hosts file configurations with your team using version control, export/import, documentation and collaboration workflows.
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Learn how DNS resolution works from the hosts file to recursive DNS servers, cache, TTL and CDNs, with a clear browser request walkthrough.
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Set up a perfect local dev environment on macOS. MAMP vs Laravel Valet vs Docker comparison, .test domains, local HTTPS with mkcert. Complete checklist.
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Install mkcert on Mac, trust the local CA, and generate HTTPS certs for localhost and .test domains. Includes Vite, Next.js, Docker, and NET::ERR_CERT_AUTHORITY_INVALID fixes.
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