How keep data plugin/themes after docker-compose

Hello,
My docker compose is :

version: "3.4"
services:
    nopcommerce_web:
        build: .
        container_name: nopcommerce
        ports:
            - "8010:80"
            - "8011:80"
            - "8012:80"        
        depends_on:
            - nopcommerce_database
        environment:
          ASPNETCORE_ENVIRONMENT: ${ASPNETCORE_ENVIRONMENT}          
          ConnectionStrings__ConnectionString: ${CONNECTIONSTRING}
    nopcommerce_database:
        image: "mcr.microsoft.com/mssql/server:2019-latest"
        container_name: nopcommerce_mssql_server
        expose: 
          - "1433"
        environment:
            SA_PASSWORD: ${SA_PASSWORD}
            ACCEPT_EULA: "Y"
            MSSQL_PID: "Express"
        ports:
          - "1433:1433"
        volumes:
          - nopcommerce_db:/var/opt/mssql
volumes:
  nopcommerce_data:        
  nopcommerce_db:

With the connection string, if I use docker-compose down and docker-compose up -d, the information for the connection string is okay, but I lose my theme or plugin installed.
I don't want to create a volume for the entire website because I would like to personalize multiple pages if necessary.
Thanks for your help


-->I find the solution, we need modify dockerignores and dockerfile to includes plugins

In your case, to preserve the themes or plugins installed in your nopCommerce, you need to bind volumes for those specific directories.

I copied the plugin files from the Dockerfile. When I restart docker-compose, I do indeed have the plugin installed. The data is saved in a database, I suppose? So, the result is the same as if I had used a volume?

In the site's \App_Data folder there is plugins.json file that indicates which plugins are installed.
Once a plugin is installed, then it creates its settings in the [Setting] table of the DB.

The "Default store theme" is selected (per store) on the Admin > General Settings  page.  Thus that setting is in the [Setting] table of the DB. (storeinformationsettings.defaultstoretheme)

When I create a volum to plugins.json I have this error : Storing keys in a directory '/app/App_Data/DataProtectionKeys' that may not be persisted outside of the container. Protected data will be unavailable when container is destroyed.
Unhandled exception. System.AggregateException: One or more errors occurred. (Access to the path '/app/App_Data/plugins.json' is denied.).
My docker-compose:

version: "3.4"
services:
    nopcommerce_web:
        build: .
        container_name: nopcommerce
        ports:
            - "8012:80"         
        depends_on:
            - nopcommerce_database
        environment:
          ASPNETCORE_ENVIRONMENT: ${ASPNETCORE_ENVIRONMENT}          
          ConnectionStrings__ConnectionString: ${CONNECTIONSTRING}
        volumes:
          - plugins_json_volume:/app/App_Data/plugins.json
    nopcommerce_database:
        image: "mcr.microsoft.com/mssql/server:2019-latest"
        container_name: nopcommerce_mssql_server
        expose: 
          - "1433"
        environment:
            SA_PASSWORD: ${SA_PASSWORD}
            ACCEPT_EULA: "Y"
            MSSQL_PID: "Express"
        ports:
          - "1433:1433"
        volumes:
          - nopcommerce_db:/var/opt/mssql
volumes:
  nopcommerce_db:
  plugins_json_volume:

As per the error message, it's unable to access the file at ‘/app/App_Data/plugins.json’
This can be because
- file does not exist.  Is the "/app/" folder correct?
- the app doesn’t have the necessary permissions. (Give read, write, and execute permissions for the file.)
- the user running the Docker container might not have the necessary permissions to access the file.