Container Update is incomplete - add image prune

[MazziaRick]

⚠️ Please verify that this feature request has NOT been suggested before.

• I checked and didn't find similar feature request

🏷️ Feature Request Type

API

🔖 Feature description

At the moment the update button executes the following terminal commands :

docker compose pull
docker compose up -d --remove-orphans

In this way the update life-cycle is incomplete because old images, no more used by containers, remains on the host file system progressively filling up the disk space.

✔️ Solution

I think the next command that should be added on the update process is this :

docker image prune --all --force

The update maintenance life-cycle is then complete.

❓ Alternatives

An alternative could be to add a prune button on the UI, but this would require a manual action beside the Update one.

📝 Additional Context

Here the modified update function on backend/stack.ts :

async update(socket: DockgeSocket) {
    const terminalName = getComposeTerminalName(socket.endpoint, this.name);
    let exitCode = await Terminal.exec(this.server, socket, terminalName, "docker", [ "compose", "pull" ], this.path);
    if (exitCode !== 0) {
        throw new Error("Failed to pull, please check the terminal output for more information.");
    }

    // If the stack is not running, we don't need to restart it
    await this.updateStatus();
    log.debug("update", "Status: " + this.status);
    if (this.status !== RUNNING) {
        return exitCode;
    }

    exitCode = await Terminal.exec(this.server, socket, terminalName, "docker", [ "compose", "up", "-d", "--remove-orphans" ], this.path);
    if (exitCode !== 0) {
        throw new Error("Failed to restart, please check the terminal output for more information.");
    }

    exitCode = await Terminal.exec(this.server, socket, terminalName, "docker", [ "image", "prune", "--all", "--force" ], this.path);
    if (exitCode !== 0) {
        throw new Error("Failed to restart, please check the terminal output for more information.");
    }

    return exitCode;
}

I also created a pull request for this : #834