# Reusable Tend examples This subtree is licensed 0BSD so an operator can copy and adapt it without bringing the Tend program's AGPL license into an application configuration. The blue/green example expects separately reviewed environment files: ```text # /etc/example-site/blue.env EXAMPLE_LISTEN=127.0.0.1:8090 # /etc/example-site/green.env EXAMPLE_LISTEN=127.0.0.1:8091 ``` Production configuration belongs outside the source checkout, owned by root, and not group- or world-writable. The Caddy handler template is an entire imported handler fragment; the enclosing site, matchers, and routing precedence remain operator-owned.