Add Docker support

Docker configuration:
- Dockerfile: Multi-stage build with non-root user, health checks
- Dockerfile.migrations: Runs EF Core migrations on startup
- docker-compose.yml: Full stack with SQL Server, Azurite, app
- .dockerignore: Optimized build context
- .env.example: Template for API keys

Application changes:
- Added /health endpoint with EF Core database check
- Conditional HTTPS redirect (disabled in containers)
- DOTNET_RUNNING_IN_CONTAINER environment detection

Usage:
  cp .env.example .env  # Add your API keys
  docker-compose up -d  # Start all services

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/TrueCV.Web/Program.cs

@@ -56,6 +56,10 @@ try
     builder.Services.AddCascadingAuthenticationState();
     builder.Services.AddScoped<AuthenticationStateProvider, RevalidatingIdentityAuthenticationStateProvider<ApplicationUser>>();
 
+    // Add health checks
+    builder.Services.AddHealthChecks()
+        .AddDbContextCheck<ApplicationDbContext>("database");
+
     var app = builder.Build();
 
     // Configure the HTTP request pipeline.
@@ -66,7 +70,15 @@ try
         app.UseHsts();
     }
 
-    app.UseHttpsRedirection();
+    // Only use HTTPS redirection when not running in Docker/container
+    if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("DOTNET_RUNNING_IN_CONTAINER")))
+    {
+        // Running in container - skip HTTPS redirect (handled by reverse proxy)
+    }
+    else
+    {
+        app.UseHttpsRedirection();
+    }
 
     app.UseStaticFiles();
     app.UseAntiforgery();
@@ -93,6 +105,9 @@ try
         return Results.Redirect("/");
     }).RequireAuthorization();
 
+    // Health check endpoint
+    app.MapHealthChecks("/health");
+
     app.MapRazorComponents<App>()
         .AddInteractiveServerRenderMode();