Bagatur/docs serve context (#13150)

docs/docs/get_started/introduction.mdx

@@ -43,18 +43,32 @@ These docs focus on the Python LangChain library. [Head here](https://js.langcha
 
 :::
 
+## LangChain Expression Language (LCEL)
+
+LCEL is a declarative way to compose chains. LCEL was designed from day 1 to support putting prototypes in production, with no code changes, from the simplest “prompt + LLM” chain to the most complex chains.
+
+- **[Overview](/docs/expression_language/)**: LCEL and its benefits
+- **[Interface](/docs/expression_language/interface)**: The standard interface for LCEL objects
+- **[How-to](/docs/expression_language/interface)**: Key features of LCEL
+- **[Cookbook](/docs/expression_language/cookbook)**: Example code for accomplishing common tasks
+
+
 ## Modules
 
 LangChain provides standard, extendable interfaces and integrations for the following modules:
 
 #### [Model I/O](/docs/modules/model_io/)
 Interface with language models
+
 #### [Retrieval](/docs/modules/data_connection/)
 Interface with application-specific data
+
 #### [Agents](/docs/modules/agents/)
-Let chains choose which tools to use given high-level directives
+Let models choose which tools to use given high-level directives
+
 
 ## Examples, ecosystem, and resources
+
 ### [Use cases](/docs/use_cases/question_answering/)
 Walkthroughs and techniques for common end-to-end use cases, like:
 - [Document question answering](/docs/use_cases/question_answering/)
@@ -63,14 +77,17 @@ Walkthroughs and techniques for common end-to-end use cases, like:
 - and much more...
 
 ### [Integrations](/docs/integrations/providers/)
-LangChain is part of a rich ecosystem of tools that integrate with our framework and build on top of it. Check out our growing list of [integrations](/docs/integrations/providers/) and [dependent repos](/docs/additional_resources/dependents).
+LangChain is part of a rich ecosystem of tools that integrate with our framework and build on top of it. Check out our growing list of [integrations](/docs/integrations/providers/).
 
 ### [Guides](/docs/guides/adapters/openai)
 Best practices for developing with LangChain.
 
+### [API reference](https://api.python.langchain.com)
+Head to the reference section for full documentation of all classes and methods in the LangChain and LangChain Experimental Python packages.
+
+### [Developer's guide](/docs/contributing)
+Check out the developer's guide for guidelines on contributing and help getting your dev environment set up.
+
 ### [Community](/docs/community)
 Head to the [Community navigator](/docs/community) to find places to ask questions, share feedback, meet other developers, and dream about the future of LLM’s.
 
-## API reference
-
-Head to the [reference](https://api.python.langchain.com) section for full documentation of all classes and methods in the LangChain Python package.

docs/docusaurus.config.js

@@ -216,6 +216,10 @@ const config = {
                 href: "https://github.com/langchain-ai/langserve",
                 label: "LangServe GitHub",
               },
+              {
+                href: "https://github.com/langchain-ai/langchain/tree/master/templates",
+                label: "Templates GitHub",
+              },
               {
                 href: "https://smith.langchain.com/hub",
                 label: "LangChain Hub",