feat(docker): Gracefully reload Caddy configuration

CaddyManager.Contracts/Configurations/Docker/DockerServiceConfiguration.cs

@@ -16,6 +16,12 @@ public class DockerServiceConfiguration
     /// Uri to the Docker host
     /// </summary>
     public string DockerHost { get; set; } = "unix:///var/run/docker.sock";
+
+    /// <summary>
+    /// Path to the Caddyfile as seen from inside the Caddy container, used by `caddy reload`. Must match the
+    /// container side of the Caddy container's config volume mount.
+    /// </summary>
+    public string CaddyConfigPathInContainer { get; set; } = "/etc/caddy/Caddyfile";
     
     /// <summary>
     /// Returns the Docker host with environment check. If the environment variable DOCKER_HOST is set, it will return