🐳 feat: RAG for Default Docker Compose Files + Docs Update (#2246)

* refactor(deploy-compose.yml): use long-syntax to avoid implicit folder creation of librechat.yaml

* refactor(docker-compose.override.yml.example): use long-syntax to avoid implicit folder creation of librechat.yaml

* chore: add simple health check for RAG_API_URL

* chore: improve axios error handling, adding `logAxiosError`

* chore: more informative message detailing RAG_API_URL path

* feat: add rag_api and vectordb to default compose file

* chore(rag.yml): update standalone rag compose file to use RAG_PORT

* chore: documentation updates

* docs: Update rag_api.md with images

* Update rag_api.md

* Update rag_api.md, assistants clarification

* add RAG API note to breaking changes

docs/index.md

@@ -37,8 +37,11 @@ weight: -10
 ## 🪶 Features
  - 🖥️ UI matching ChatGPT, including Dark mode, Streaming, and 11-2023 updates
  - 💬 Multimodal Chat:
-     - Upload and analyze images with GPT-4 and Gemini Vision 📸 
-     - More filetypes and Assistants API integration in Active Development 🚧 
+     - Upload and analyze images with Claude 3, GPT-4, and Gemini Vision 📸
+     - Chat with Files using Custom Endpoints, OpenAI, Azure, Anthropic, & Google. 🗃️
+     - Advanced Agents with Files, Code Interpreter, Tools, and API Actions 🔦
+        - Available through the [OpenAI Assistants API](https://platform.openai.com/docs/assistants/overview) 🌤️
+        - Non-OpenAI Agents in Active Development 🚧
  - 🌎 Multilingual UI:
      - English, 中文, Deutsch, Español, Français, Italiano, Polski, Português Brasileiro, Русский
      - 日本語, Svenska, 한국어, Tiếng Việt, 繁體中文, العربية, Türkçe, Nederlands
@@ -49,7 +52,9 @@ weight: -10
  - 🔍 Search all messages/conversations
  - 🔌 Plugins, including web access, image generation with DALL-E-3 and more
  - 👥 Multi-User, Secure Authentication with Moderation and Token spend tools
- - ⚙️ Configure Proxy, Reverse Proxy, Docker, many Deployment options, and completely Open-Source
+ - ⚙️ Configure Proxy, Reverse Proxy, Docker, & many Deployment options
+ - 📖 Completely Open-Source & Built in Public
+ - 🧑‍🤝‍🧑 Community-driven development, support, and feedback
 
 ## 📃 All-In-One AI Conversations with LibreChat
 LibreChat brings together the future of assistant AIs with the revolutionary technology of OpenAI's ChatGPT. Celebrating the original styling, LibreChat gives you the ability to integrate multiple AI models. It also integrates and enhances original client features such as conversation and message search, prompt templates and plugins.