docker: added ollama and webui setup and shared page

wiki/docker/ollama_-_ollama.md

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+# ollama - ollama
+
+This is a [Docker](/wiki/docker.md) container for an ollama server.
+The official container and documentation was made by
+[ollama](https://hub.docker.com/r/ollama/ollama).
+
+## Set-up
+
+Create the file `rebuild.sh`.
+Change the settings according to your needs and run `./rebuild.sh` afterwards.
+
+## Ports
+
+Set the following ports in the `ports:` section.
+
+| Container Port | Recommended outside port | Protocol  | Description         |
+| -------------- | ------------------------ | --------- | ------------------- |
+| `11434`        | `11434`                  | TCP       | Communications port |
+
+## Volumes
+
+Set the following volumes with the -v tag.
+
+| Outside mount/volume name | Container mount | Description   |
+| ------------------------- | --------------- | ------------- |
+| `ollama`                  | `/root/.ollama` | Ollama data |
+
+## rebuild.sh
+
+```sh
+#!/bin/sh
+docker stop ollama
+docker rm ollama
+docker pull ollama/ollama
+docker run --name ollama \
+    --restart unless-stopped \
+    -p 11434:11434 \
+    -v ollama:/root/.ollama \
+    -d ollama/ollama
+```

wiki/docker/open-webui_-_open-webui.md

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+# open-webui - open-webui
+
+This is a [Docker](/wiki/docker.md) container for a Open WebUI server.
+The official container and documentation was made by
+[open-webui](https://github.com/open-webui/open-webui).
+
+## Set-up
+
+Create the file `rebuild.sh`.
+Change the settings according to your needs and run `./rebuild.sh` afterwards.
+
+## Ports
+
+Set the following ports in the `ports:` section.
+
+| Container Port | Recommended outside port | Protocol  | Description   |
+| -------------- | ------------------------ | --------- | ------------- |
+| `11434`        | `8080`                   | TCP       | WebUI         |
+
+## Volumes
+
+Set the following volumes with the -v tag.
+
+| Outside mount/volume name | Container mount     | Description     |
+| ------------------------- | ------------------- | --------------- |
+| `open-webui`              | `/app/backend/data` | Open WebUI data |
+
+## rebuild.sh
+
+```sh
+#!/bin/sh
+docker stop openwebui
+docker rm openwebui
+docker pull ghcr.io/open-webui/open-webui:main
+docker run --name openwebui \
+    --restart unless-stopped \
+    -p 11434:8080 \
+    -v open-webui:/app/backend/data \
+    -d ghcr.io/open-webui/open-webui:main
+
+```

wiki/open_webui.md

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+# Open WebUI
+
+[Open WebUI](https://openwebui.com/) is a self-hostable artifical intelligence interface that
+allows different workflows and even offline operation.
+
+## Setup
+
+The software can be setup via [Docker](/wiki/docker.md) with the
+[open-webui image](/wiki/docker/open-webui_-_open-webui.md).
+
+Additionally a provider for the artificial intelligence is needed.
+This can be done by using Ollama which can be setup via docker with the
+[ollama image](/wiki/docker/ollama_-_ollama.md).
+When using this option the address and port for Ollama has to be set in the admin settings of
+WebUI.
+
+Alternatively to a self-hosted Ollama also the official ChatGPT service can be linked to WebUI.
+This also has to be set up in the admin settings.
+
+## Usage
+
+### Downloading and Selecting New Models
+
+Models are not downloaded via the Open Webui directly.
+In fact they are managed by the provider of the AI.
+When using Ollama as described in [the setup section](#setup) the following commands can be used to
+list available networks.
+
+```sh 
+ollama list
+```
+
+Afterwards a model can be selected and pulled by using the following command. `<model>` is the name
+of the model obtained in the previous step (for example `deepseek-r1`).
+
+```sh 
+ollama pull <model>
+```
+
+After the downloading of the model it has to be set in the admin settings of WebUI.