chore: lowercase for filenames

docs/user/basics/installing.md

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+# Installing
+
+## Docker image
+
+```{note}
+The easiest way to install the framework is as a docker image. To get the image you need to login to ghcr.io with docker.
+```
+
+```{warning}
+FIXME(Arthur): to check this is still valid
+```
+
+```shell
+docker login ghcr.io
+```
+
+This command will ask for a username and a password. For username, just enter your GitHub username. For password, you should create a personal access token from [here](https://github.com/settings/tokens) selecting `read:packages` permission. Just paste the generated access token as your password, and you are good to go.
+
+You can then either pull the latest docker image or a specific version:
+
+```shell
+docker pull ghcr.io/zama-ai/concretefhe:latest
+# or
+docker pull ghcr.io/zama-ai/concretefhe:v0.1.0
+```
+
+You can then use this image with the following command:
+
+```shell
+# Without local volume:
+docker run --rm -it -p 8888:8888 ghcr.io/zama-ai/concretefhe:v0.1.0
+
+# With local volume to save notebooks on host:
+docker run --rm -it -p 8888:8888 -v /host/path:/data ghcr.io/zama-ai/concretefhe:v0.1.0
+```
+
+This will launch a **Concrete** enabled jupyter server in the docker, that you can access from your browser.
+
+Alternatively you can just open a shell in the docker:
+
+```shell
+docker run --rm -it ghcr.io/zama-ai/concretefhe:v0.1.0 /bin/bash
+```
+
+## python package
+
+```{warning}
+FIXME(Arthur): explain how to install from pypi, when it is ready
+```
+
+