add dockerfile to serve content on port 3000

add a println! statement to check that the service starts serving

.dockerignore

@@ -0,0 +1 @@
+/target

Dockerfile

@@ -0,0 +1,9 @@
+FROM rust:1.75.0
+
+WORKDIR /usr/src/chaospott-status
+COPY . .
+RUN cargo install --path .
+
+EXPOSE 3000
+
+CMD ["chaospott-status"]

src/main.rs

@@ -21,6 +21,8 @@ async fn main() {
         .route("/api/update.php", post(the_doors));
 
     let listener = tokio::net::TcpListener::bind("0.0.0.0:3000").await.unwrap();
+
+    println!("Start serving");
     axum::serve(listener, app).await.unwrap();
 }