diff --git a/Sources/ViewController/Live.swift b/Sources/ViewController/Live.swift
index 1da8436..800d71b 100644
--- a/Sources/ViewController/Live.swift
+++ b/Sources/ViewController/Live.swift
@@ -104,7 +104,11 @@ extension ViewController: DependencyKey {
         switch route {
         case let .index(mode: mode):
           // FIX: remove response.
-          return request.respond(FilterPressureDropForm(mode: mode, response: .mock(mode: mode ?? .basic)))
+          #if DEBUG
+            return request.respond(FilterPressureDropForm(mode: mode, response: .mock(mode: mode ?? .basic)))
+          #else
+            return request.respond(FilterPressureDropForm(mode: mode, response: nil))
+          #endif
         case .submit:
           // FIX: implement.
           fatalError()
diff --git a/Sources/ViewController/Views/FilterPressureDrop.swift b/Sources/ViewController/Views/FilterPressureDrop.swift
index 5f19210..4ee696a 100644
--- a/Sources/ViewController/Views/FilterPressureDrop.swift
+++ b/Sources/ViewController/Views/FilterPressureDrop.swift
@@ -41,6 +41,8 @@ struct FilterPressureDropForm: HTML, Sendable {
         }
         div {
           SubmitButton(label: "Calculate Pressure Drop")
+            // FIX: Remove when done.
+            .attributes(.disabled)
         }
       }
     }
diff --git a/justfile b/justfile
index d9a555f..4e82204 100644
--- a/justfile
+++ b/justfile
@@ -20,3 +20,5 @@ clean:
 
 push-image:
   @docker push {{docker_registiry}}/{{docker_image}}:{{docker_tag}}
+
+build-and-push: (build-docker "linux/amd64") push-image