Fix WEBSEARCH_HEADERS description in reference, add web search note to getting-started

- Reference page: correct WEBSEARCH_HEADERS from "JSON object" to
  colon-CSV format with cross-reference to MCP page
- Getting started: add NOTE about enabling web search with link to
  full MCP/web configuration

Author: kemister85

modules/ROOT/pages/tinymceai-on-premises-getting-started.adoc

@@ -197,6 +197,8 @@ docker run --init -d -p 8000:8000 \
 
 TIP: The network name is typically `<foldername>_default` (e.g., `tinymce-ai-onpremise_default` for the folder created above). Run `docker network ls` to confirm the exact name — Docker Compose versions format it differently. For multiple LLM providers, extend the `PROVIDERS` JSON: `{"openai":{...},"anthropic":{...}}`.
 
+NOTE: The launch command above starts the AI service with basic conversation support. To enable *web search* in conversations, add `WEBSEARCH_ENABLED='true'` and `WEBSEARCH_ENDPOINT` (pointing to a search backend) to the `docker run` command. See xref:tinymceai-on-premises-mcp.adoc#web-scraping-and-search[Web scraping and web search] for the full configuration, endpoint contracts, and a SerpAPI example.
+
 For Podman, replace `docker run` with `podman run` and use a Podman pod instead of a compose network. See xref:tinymceai-on-premises-production.adoc[Production deployment] for Podman-specific guidance. See xref:tinymceai-on-premises-production.adoc#_podman_deployment[Podman deployment] for a full example.
 
 For native databases (the database runs on the host or in a managed service rather than in Docker), drop the `--network` flag and set `DATABASE_HOST=host.docker.internal` (Docker Desktop and Podman 4{plus}). On native Linux Docker, additionally pass `--add-host=host.docker.internal:host-gateway`.

modules/ROOT/pages/tinymceai-on-premises-reference.adoc

@@ -62,7 +62,7 @@ Alphabetized. Required-ness is marked relative to a minimum working deployment.
 |`WEBRESOURCES_REQUEST_TIMEOUT` |No |- |Scraper request timeout in ms.
 |`WEBSEARCH_ENABLED` |No |`false` |Enable web search forwarding. See xref:tinymceai-on-premises-mcp.adoc#web-scraping-and-search[Web scraping and web search].
 |`WEBSEARCH_ENDPOINT` |If web search enabled |- |Search URL.
-|`WEBSEARCH_HEADERS` |No |- |JSON object; extra headers sent to the search endpoint.
+|`WEBSEARCH_HEADERS` |No |- |Colon-CSV format (`Header-Name: value, Another: value`). Extra headers sent to the search endpoint. Do not use JSON — see xref:tinymceai-on-premises-mcp.adoc#web-scraping-and-search[Web scraping and web search].
 |`WEBSEARCH_REQUEST_TIMEOUT` |No |- |Search request timeout in ms.
 |===