I read that we can considerate the affine scheme $\mathrm{Spec}(\mathbb{Z})$ like a curve over $\mathrm{Spec}(\mathbb{F}_1)$ where $\mathbb{F}_1$ is the field with one element.
So, can we also considerate $\mathcal{O}_K$ (ring of integers of a number field $K$) as a curve over $\mathrm{Spec}(\mathbb{F}_1)$ too ?