copy edit troubleshooting

Author: ethanpalm

guides/reverse-proxy.mdx

@@ -82,13 +82,13 @@ server {
 }
 ```
 
-## Common issues and troubleshooting
+## Troubleshooting
 
 ### 404 error
 
-**Symptoms**: Documentation loads but features don't work, API calls fail
+**Symptoms**: Documentation loads, but features don't work. API calls fail.
 
-**Cause**: Host header is being forwarded or Origin header is missing
+**Cause**: `Host` header is being forwarded or `Origin` header is missing.
 
 **Solution**:
 
@@ -99,9 +99,9 @@ server {
 
 **Symptoms**: Slow page loads and layout shifts.
 
-**Cause**: Incorrect caching configuration
+**Cause**: Incorrect caching configuration.
 
-**Solution**: Enable caching only for `/mintlify-assets/_next/static/*` paths
+**Solution**: Enable caching only for `/mintlify-assets/_next/static/*` paths.
 
 ## Support limitations