You can easily add services to your application stack by updating the `compose.yaml` file.

Update your `compose.yaml` to add a new service for phpMyAdmin. For more details, see the [phpMyAdmin Official Docker Image](https://hub.docker.com/_/phpmyadmin). The following is the updated `compose.yaml` file.

```yaml {hl_lines="42-49"}
services:
  server:
    build:
      context: .
    ports:
      - 9000:80
    depends_on:
      db:
        condition: service_healthy
    secrets:
      - db-password
    environment:
      - PASSWORD_FILE_PATH=/run/secrets/db-password
      - DB_HOST=db
      - DB_NAME=example
      - DB_USER=root
  db:
    image: mariadb
    restart: always
    user: root
    secrets:
      - db-password
    volumes:
      - db-data:/var/lib/mysql
    environment:
      - MARIADB_ROOT_PASSWORD_FILE=/run/secrets/db-password
      - MARIADB_DATABASE=example
    expose:
      - 3306
    healthcheck:
      test:
        [
          "CMD",
          "/usr/local/bin/healthcheck.sh",
          "--su-mysql",
          "--connect",
          "--innodb_initialized",
        ]
      interval: 10s
      timeout: 5s
      retries: 5
  phpmyadmin:
    image: phpmyadmin
    ports:
      - 8080:80
    depends_on:
      - db
    environment:
      - PMA_HOST=db
volumes:
  db-data:
secrets:
  db-password:
    file: db/password.txt
```

In the terminal, run `docker compose up` to run your application again.

```console
$ docker compose up --build
```

Open [http://localhost:8080](http://localhost:8080) in your browser to access phpMyAdmin. Log in using `root` as the username and `example` as the password. You can now interact with the database through phpMyAdmin.

Press `ctrl+c` in the terminal to stop your application.

## Automatically update services

Use Compose Watch to automatically update your running Compose services as you edit and save your code. For more details about Compose Watch, see [Use Compose Watch](/manuals/compose/how-tos/file-watch.md).

Open your `compose.yaml` file in an IDE or text editor and then add the Compose Watch instructions. The following is the updated `compose.yaml` file.

```yaml {hl_lines="17-21"}
services:
  server:
    build:
      context: .
    ports:
      - 9000:80
    depends_on:
      db:
        condition: service_healthy
    secrets:
      - db-password
    environment:
      - PASSWORD_FILE_PATH=/run/secrets/db-password
      - DB_HOST=db
      - DB_NAME=example
      - DB_USER=root
    develop:
      watch:
        - action: sync
          path: ./src
          target: /var/www/html
  db:
    image: mariadb
    restart: always
    user: root
    secrets:
      - db-password
    volumes:
      - db-data:/var/lib/mysql
    environment:
      - MARIADB_ROOT_PASSWORD_FILE=/run/secrets/db-password
      - MARIADB_DATABASE=example
    expose:
      - 3306
    healthcheck:
      test:
        [
          "CMD",
          "/usr/local/bin/healthcheck.sh",
          "--su-mysql",
          "--connect",
          "--innodb_initialized",
        ]
      interval: 10s
      timeout: 5s
      retries: 5
  phpmyadmin:
    image: phpmyadmin
    ports:
      - 8080:80
    depends_on:
      - db
    environment:
      - PMA_HOST=db
volumes:
  db-data:
secrets:
  db-password:
    file: db/password.txt
```

Run the following command to run your application with Compose Watch.

```console
$ docker compose watch
```

Open a browser and verify that the application is running at [http://localhost:9000/hello.php](http://localhost:9000/hello.php).

Any changes to the application's source files on your local machine will now be
immediately reflected in the running container.

Open `hello.php` in an IDE or text editor and update the string `Hello, world!` to `Hello, Docker!`.

Save the changes to `hello.php` and then wait a few seconds for the application to sync. Refresh [http://localhost:9000/hello.php](http://localhost:9000/hello.php) in your browser and verify that the updated text appears.

Press `ctrl+c` in the terminal to stop Compose Watch. Run `docker compose down` in the terminal to stop the application.