Doc: Updated frequently asked questions and answers. (#14085)

### What problem does this PR solve?

Updated frequently asked questions. 

### Type of change

- [x] Documentation Update

README.md

@@ -88,7 +88,7 @@ Try our demo at [https://cloud.ragflow.io](https://cloud.ragflow.io).
 
 ## 🔥 Latest Updates
 
-- 2026-03-24 [RAGFlow Skill on OpenClaw](https://clawhub.ai/yingfeng/ragflow-skill) — Provides an official skill to access RAGFlow datasets via OpenClaw.
+- 2026-03-24 [RAGFlow Skill on OpenClaw](https://clawhub.ai/yingfeng/ragflow-skill) — Provides an official skill for accessing RAGFlow datasets via OpenClaw.
 - 2025-12-26 Supports 'Memory' for AI agent.
 - 2025-11-19 Supports Gemini 3 Pro.
 - 2025-11-12 Supports data synchronization from Confluence, S3, Notion, Discord, Google Drive.

docs/faq.mdx

@@ -195,6 +195,20 @@ This error suggests that you do not have Internet access or are unable to connec
 
 ---
 
+### `RuntimeError: Unable to start Tika server.`
+
+This error is almost always caused by Java not being installed or not accessible in the environment. See [here](https://github.com/infiniflow/ragflow/issues/13194) for detailed instructions.
+
+---
+
+### `Cannot stat '/etc/nginx/conf.d/ragflow.conf.python': No such file or directory`
+
+To resolve this, either download the missing file from the corresponding tag on [GitHub](https://github.com/infiniflow/ragflow) or update `~/ragflow/docker/docker-compose.yml` as follows: 
+
+![](https://raw.githubusercontent.com/infiniflow/ragflow-docs/main/images/docker-compose_missing.jpg)
+
+---
+
 ### `WARNING: can't find /ragflow/rag/res/borker.tm`
 
 Ignore this warning and continue. All system warnings can be ignored.