1038 - Streamlit bot with LocalAI (#1072)

**Description**

This PR fixes #1038

Added Streamlit example and also updated readme for examples.


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examples/streamlit-bot/README.md

@@ -0,0 +1,54 @@
+## Streamlit bot
+
+![Screenshot](streamlit-bot.png)
+
+This is an example to deploy a Streamlit bot with LocalAI instead of OpenAI. Instructions are for Windows.
+
+```bash
+# Install & run Git Bash
+
+# Clone LocalAI
+git clone https://github.com/go-skynet/LocalAI.git
+cd LocalAI
+
+# (optional) Checkout a specific LocalAI tag
+# git checkout -b build <TAG>
+
+# Use a template from the examples
+cp -rf prompt-templates/ggml-gpt4all-j.tmpl models/
+
+# (optional) Edit the .env file to set things like context size and threads
+# vim .env
+# Download model
+curl --progress-bar -C - -O https://gpt4all.io/models/ggml-gpt4all-j.bin > models/ggml-gpt4all-j.bin
+
+# Install & Run Docker Desktop for Windows
+https://www.docker.com/products/docker-desktop/
+
+# start with docker-compose
+docker-compose up -d --pull always
+# or you can build the images with:
+# docker-compose up -d --build
+# Now API is accessible at localhost:8080
+curl http://localhost:8080/v1/models
+# {"object":"list","data":[{"id":"ggml-gpt4all-j","object":"model"}]}
+
+curl http://localhost:8080/v1/chat/completions -H "Content-Type: application/json" -d '{
+     "model": "ggml-gpt4all-j",
+     "messages": [{"role": "user", "content": "How are you?"}],
+     "temperature": 0.9
+   }'
+
+# {"model":"ggml-gpt4all-j","choices":[{"message":{"role":"assistant","content":"I'm doing well, thanks. How about you?"}}]}
+
+cd examples/streamlit-bot
+
+install_requirements.bat
+
+# run the bot
+start_windows.bat
+
+# UI will be launched automatically (http://localhost:8501/) in browser.
+
+```
+