Unable to find plugin "medusa-file-spaces" with Dockerised Medusa build

[tawdry bone]

I'm trying to add the spaces plugin to a Dockerised Medusa starter. When running docker-compose up --build I'm getting this error:

Error: Unable to find plugin "medusa-file-spaces". Perhaps you need to install its package?

It's defnitely in the package.json and in the medusa-config.js, and according to the Dockerfile the package.json does get copied over properly. Am I missing something here? I'm also not very familiar with Docker (but it's a requirement for this project).

Any help would be greatly appreciated!

My deps for the server:

    "@medusajs/medusa": "^1.7.14",
    "@medusajs/medusa-cli": "^1.3.8",
    "medusa-file-spaces": "^1.3.5",
    "medusa-fulfillment-manual": "^1.1.36",
    "medusa-interfaces": "^1.3.6",
    "medusa-payment-manual": "^1.0.22",
    "medusa-payment-stripe": "^1.1.53",
    "typeorm": "^0.2.36"

I'm a silly billy, I just forgot to delete the volume associated to the node_modules. Nothing to see here ^^