examples: simplify langchain-python (#541)

examples/langchain-python/README.md

@@ -12,15 +12,8 @@ git clone https://github.com/go-skynet/LocalAI
 
 cd LocalAI/examples/langchain-python
 
-# (optional) Checkout a specific LocalAI tag
-# git checkout -b build <TAG>
-
-# Download gpt4all-j to models/
-wget https://gpt4all.io/models/ggml-gpt4all-j.bin -O models/ggml-gpt4all-j
-
 # start with docker-compose
-docker-compose up -d --build
-
+docker-compose up --pull always
 
 pip install langchain
 pip install openai

examples/langchain-python/docker-compose.yaml

@@ -3,6 +3,14 @@ version: '3.6'
 services:
   api:
     image: quay.io/go-skynet/local-ai:latest
+    # As initially LocalAI will download the models defined in PRELOAD_MODELS
+    # you might need to tweak the healthcheck values here according to your network connection.
+    # Here we give a timespan of 20m to download all the required files.
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/readyz"]
+      interval: 1m
+      timeout: 20m
+      retries: 20
     build:
       context: ../../
       dockerfile: Dockerfile
@@ -11,6 +19,9 @@ services:
     environment:
       - DEBUG=true
       - MODELS_PATH=/models
+      # You can preload different models here as well.
+      # See: https://github.com/go-skynet/model-gallery
+      - 'PRELOAD_MODELS=[{"url": "github:go-skynet/model-gallery/gpt4all-j.yaml", "name": "gpt-3.5-turbo"}]'
     volumes:
       - ./models:/models:cached
-    command: ["/usr/bin/local-ai" ]
+    command: ["/usr/bin/local-ai" ]

examples/langchain-python/models

@@ -1 +0,0 @@
-../chatbot-ui/models