fix(docs): escape Vue template syntax in Docker Compose documentation

Wrap environment variable examples in v-pre container to prevent VitePress from interpreting {{ }} syntax as Vue template interpolation. This fixes a runtime error where `{{environment.SOME_SHARED_VARIABLE}}` was being evaluated as JavaScript instead of displayed as literal documentation text.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: Cinzya

docs/knowledge-base/docker/compose.md

@@ -133,6 +133,8 @@ services:
 
 3. Define the variable explicitly in the applications Environment Variables referencing your shared variable created in step 1;
 
+::: v-pre
+
 If in developer view, you can enter it like so;
 
 ```
@@ -141,6 +143,8 @@ SOME_VARIABLE_IN_COOLIFY_UI={{environment.SOME_SHARED_VARIABLE}}
 
 Or in the normal view, the Name is what's referenced in the Docker Compose file `SOME_VARIABLE_IN_COOLIFY_UI` with the Value being the referenced environment variable `{{environment.SOME_SHARED_VARIABLE}}` as seen below. Once saved if correct, you'll see there's a third text box, if you reveal this, you should be able to see the true value, in this case `SOME_VALUE`.
 
+:::
+
 <ZoomableImage src="/docs/images/knowledge-base/compose/2.webp" />
 
 ### Coolify's Magic Environment Variables