Add docker_sample to examples collection

Cargo.toml

@@ -45,4 +45,5 @@ members = [
    "websocket-chat",
 #   "websocket-chat-broker",
    "websocket-tcp-chat",
+   "docker_sample",
 ]

docker_sample/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "docker_sample"
+version = "0.1.0"
+authors = ["docker_sample <docker_sample@sample.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+actix-rt = "1.0.0"
+actix-web = "2.0.0"

docker_sample/Dockerfile

@@ -0,0 +1,15 @@
+FROM rust:1 as builder
+
+COPY . .
+
+RUN cargo build --release
+
+FROM rust:1-slim-stretch
+
+COPY --from=builder /target/release/docker_sample .
+
+RUN ls -la /docker_sample
+
+EXPOSE 5000
+
+ENTRYPOINT ["/docker_sample"]

docker_sample/README.MD

@@ -0,0 +1,23 @@
+
+Build image:
+
+```shell
+  docker build -t docker_sample --force-rm --no-cache -f  Dockerfile .
+```
+
+Run image:
+
+```shell
+  
+  echo "== start sample_docker"
+  docker run -d -p 5000:5000 docker_sample &
+  docker ps
+
+  echo "== wait 3s for startup"
+  sleep 3s
+
+  echo "== curl both routes"
+  curl http://localhost:5000
+  curl http://localhost:5000/again 
+
+```

docker_sample/src/main.rs

@@ -0,0 +1,30 @@
+#[macro_use]
+extern crate actix_web;
+
+use actix_web::{web, App, HttpResponse, HttpServer, Responder};
+
+#[get("/")]
+async fn index() -> impl Responder {
+    println!("GET: /");
+    HttpResponse::Ok().body("Hello world!")
+}
+
+#[get("/again")]
+async fn again() -> impl Responder {
+    println!("GET: /again");
+    HttpResponse::Ok().body("Hello world again!")
+}
+
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
+    println!("Starting actix-web server");
+
+    HttpServer::new(|| {
+        App::new()
+            .service(index)
+            .service(again)
+    })
+    .bind("0.0.0.0:5000")?
+    .run()
+    .await
+}