update angular sample

Signed-off-by: Anca Iordache <anca.iordache@docker.com>

samples/angular/README.md

@@ -0,0 +1,70 @@
+## Compose sample - Angular service
+
+Project structure:
+```
+.
+├── angular
+│   ├── Dockerfile
+│   ├── ...
+│   ├── ...
+│   ....
+│   
+├── docker-compose.yaml
+└── README.md
+
+```
+
+_docker-compose.yaml_
+```
+version: "3.7"
+services:
+  angular:
+    build: angular
+    ports:
+    - 80:4200
+    ...
+
+```
+The compose file defines an application with one service `angular`. The image for the service is built with the Dockerfile inside the `angular` directory (build parameter).
+
+When deploying the application, docker-compose maps the container port 4200 to port 80 of the host as specified in the file.
+Make sure port 80 is not being used by another container, otherwise the port should be changed.
+
+
+## Deploy with docker-compose
+
+```
+$ docker-compose up -d
+Creating network "angular_default" with the default driver
+Building angular
+Step 1/7 : FROM node:10
+10: Pulling from library/node
+c0c53f743a40: Pull complete
+...
+...
+Successfully built efea5cef6851
+Successfully tagged angular_web:latest
+WARNING: Image for service web was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`.
+Creating angular_web_1 ... done
+```
+
+
+## Expected result
+
+Listing containers must show a container running and the port mapping as below:
+```
+$ docker ps
+CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                  NAMES
+6884c228388e        angular_web         "docker-entrypoint.s…"   42 seconds ago      Up 36 seconds       0.0.0.0:80->4200/tcp   angular_web_1
+
+```
+
+Open a browser and go to localhost.
+
+![page](http://output.jpg)
+
+Stop and remove the container
+
+```
+$ docker-compose down
+```

samples/angular/docker-compose.yaml

@@ -1,6 +1,6 @@
 version: "3.7"
 services:
-  angular:
+  web:
     build: angular
     ports:
     - 80:4200