Update env sample file for Azure

env.example

@@ -77,14 +77,17 @@ MAX_ASYNC=4
 ### MAX_TOKENS: max tokens send to LLM for entity relation summaries (less than context size of the model)
 ### MAX_TOKENS: set as num_ctx option for Ollama by API Server
 MAX_TOKENS=32768
-### LLM Binding type: openai, ollama, lollms
+### LLM Binding type: openai, ollama, lollms, azure_openai
 LLM_BINDING=openai
 LLM_MODEL=gpt-4o
 LLM_BINDING_HOST=https://api.openai.com/v1
 LLM_BINDING_API_KEY=your_api_key
+### Optional for Azure
+# AZURE_OPENAI_API_VERSION=2024-08-01-preview
+# AZURE_OPENAI_DEPLOYMENT=gpt-4o
 
 ### Embedding Configuration
-### Embedding Binding type: openai, ollama, lollms
+### Embedding Binding type: openai, ollama, lollms, azure_openai
 EMBEDDING_BINDING=ollama
 EMBEDDING_MODEL=bge-m3:latest
 EMBEDDING_DIM=1024
@@ -97,6 +100,9 @@ EMBEDDING_BINDING_HOST=http://localhost:11434
 # EMBEDDING_FUNC_MAX_ASYNC=16
 ### Maximum tokens sent to Embedding for each chunk (no longer in use?)
 # MAX_EMBED_TOKENS=8192
+### Optional for Azure
+# AZURE_EMBEDDING_DEPLOYMENT=text-embedding-3-large
+# AZURE_EMBEDDING_API_VERSION=2023-05-15
 
 ### Data storage selection
 # LIGHTRAG_KV_STORAGE=PGKVStorage