systemd startup script example to run the app at boot

README.md

@@ -86,6 +86,7 @@ See the [detailed doc](https://github.com/moma/comex2/blob/master/doc/nginx_conf
  |------------------------------|
 ```
 
+In production, you may want to have the app run at boot. In that case, see the [startup script doc](https://github.com/moma/comex2/blob/master/doc/startup_script.md) on this subject.
 
 ## About the data
 

doc/startup_script.md

+## Startup script
+
+In production, you may want to start the app's container automatically at boot.
+
+### Exemple service
+The suggested way is to create and enable a `systemd` service.
+
+ 1. Create a new service file in your systemd directory
+    ```
+    sudo touch /etc/systemd/system/comex2_docker.service
+    ```
+ 2. You can use the following exemple for the contents of this new service file:
+    ```
+    [Unit]
+    Description=Docker-compose container for comex2
+    Requires=docker.service
+    After=docker.service
+
+    [Service]
+    Type=oneshot
+    RemainAfterExit=yes
+
+    # docker-compose up
+    ExecStart=/usr/bin/docker-compose -f /PATH/TO/YOUR/comex2/setup/dockers/docker-compose.yml up -d
+
+    # docker-compose down
+    ExecStop=/usr/bin/docker-compose -f /PATH/TO/YOUR/comex2/setup/dockers/docker-compose.yml down
+
+    [Install]
+    WantedBy=multi-user.target
+    ```
+    Remember to edit the 'PATH/TO/YOUR/comex2' arguments to fit your installation directory.
+
+ 3. Test if it works by reloading systemd and starting the service
+    ```
+    sudo systemctl daemon-reload
+    sudo systemctl start comex2_docker.service
+    ```
+    also, to stop it manually:
+    ```
+    sudo systemctl stop comex2_docker.service
+    ```
+
+ 4. Finally to make this service permanently enabled at boot, use the command:
+    ```
+    sudo systemctl enable comex2_docker.service
+    ```
+
+
+(see [docker systemd docs](https://docs.docker.com/engine/admin/host_integration/#systemd) for more information)