# Configure Caddy POST http://localhost:2019/load Content-Type: text/caddyfile ``` { skip_install_trust http_port 9080 https_port 9443 local_certs debug } localhost { header "X-Custom-Header" "Custom-Value" } ``` GET https://localhost:9443 [Options] insecure: true HTTP 200 [Asserts] header "X-Custom-Header" == "Custom-Value"