add embeddings model dimension env var

Author: john0isaac

.env.example

@@ -5,6 +5,7 @@ AZURE_OPENAI_CHAT_MODEL_NAME="gpt-4o-mini"
 AZURE_OPENAI_CHAT_DEPLOYMENT_NAME="<YOUR-OPENAI-CHAT-DEPLOYMENT-NAME>"
 AZURE_OPENAI_EMBEDDINGS_MODEL_NAME="text-embedding-3-small"
 AZURE_OPENAI_EMBEDDINGS_DEPLOYMENT_NAME="<YOUR-OPENAI-EMBEDDING-DEPLOYMENT-NAME>"
+AZURE_OPENAI_EMBEDDINGS_DIMENSIONS="1536"
 AZURE_OPENAI_DEPLOYMENT_NAME="<YOUR-OPENAI-DEPLOYMENT-NAME>"
 AZURE_OPENAI_ENDPOINT="https://<YOUR-OPENAI-DEPLOYMENT-NAME>.openai.azure.com/"
 AZURE_OPENAI_API_KEY="<YOUR-DEPLOYMENT-KEY>"