docs: combine docker run command into a single line for ease of running in non-linux shell (e.g windows powershell) (#563)

* chore: Added Powershell compat

* fix: docker.mdx

Fix of my previous approach

* fix: docker.mdx

this time, i swear

* Fixed Powershell instruction (again), added
command to non-cuda tab

* Update docker.mdx

* Update docker.mdx

* Update docker.mdx

---------

Co-authored-by: Meng Zhang <meng@tabbyml.com>

website/docs/installation/docker.mdx

@@ -13,19 +13,14 @@ import TabItem from '@theme/TabItem';
   <TabItem value="cpu" label="CPU" default>
 
   ```bash title="run.sh"
-  docker run -it \
-    -p 8080:8080 -v $HOME/.tabby:/data \
-    tabbyml/tabby serve --model TabbyML/StarCoder-1B
+  docker run -it -p 8080:8080 -v $HOME/.tabby:/data tabbyml/tabby serve --model TabbyML/StarCoder-1B
   ```
 
   </TabItem>
   <TabItem value="cuda" label="CUDA (requires NVIDIA Container Toolkit)" default>
 
   ```bash title="run.sh"
-  docker run -it \
-    --gpus all -p 8080:8080 -v $HOME/.tabby:/data \
-    tabbyml/tabby \
-    serve --model TabbyML/StarCoder-1B --device cuda
+  docker run -it --gpus all -p 8080:8080 -v $HOME/.tabby:/data tabbyml/tabby serve --model TabbyML/StarCoder-1B --device cuda
   ```
 
   </TabItem>