feat: add Kamal deployment configuration

Author: Layoric

MyApp/Configure.HealthChecks.cs

@@ -0,0 +1,37 @@
+using Microsoft.Extensions.Diagnostics.HealthChecks;
+
+[assembly: HostingStartup(typeof(MyApp.HealthChecks))]
+
+namespace MyApp;
+
+public class HealthChecks : IHostingStartup
+{
+    public class HealthCheck : IHealthCheck
+    {
+        public async Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken token = default)
+        {
+            // Perform health check logic here
+            return HealthCheckResult.Healthy();
+        }
+    }
+
+    public void Configure(IWebHostBuilder builder)
+    {
+        builder.ConfigureServices(services =>
+        {
+            services.AddHealthChecks()
+                .AddCheck<HealthCheck>("HealthCheck");
+
+            services.AddTransient<IStartupFilter, StartupFilter>();
+        });
+    }
+    
+    public class StartupFilter : IStartupFilter
+    {
+        public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next)
+            => app => {
+                app.UseHealthChecks("/up");
+                next(app);
+            };
+    }
+}

config/deploy.yml

@@ -4,6 +4,10 @@ service: my-app
 # Name of the container image.
 image: my-user/myapp
 
+# Required for use of ASP.NET Core with Kamal-Proxy.
+env:
+  ASPNETCORE_FORWARDEDHEADERS_ENABLED: true
+
 # Deploy to these servers.
 servers:
   # IP address of server, optionally use env variable.
@@ -21,11 +25,6 @@ proxy:
   # kamal-proxy connects to your container over port 80, use `app_port` to specify a different port.
   app_port: 8080
 
-  healthcheck:
-    interval: 3
-    path: /metadata
-    timeout: 3
-
 # Credentials for your image host.
 registry:
   # Specify the registry server, if you're not using Docker Hub