build: run the Docker image on Python 3.13, and set up with it in the README

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.12-slim AS builder
+FROM python:3.13-slim AS builder
 
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PIP_DISABLE_PIP_VERSION_CHECK=1
@@ -10,7 +10,7 @@ WORKDIR /build
 COPY . .
 RUN pip install --no-cache-dir .
 
-FROM python:3.12-slim
+FROM python:3.13-slim
 
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1

README.md

@@ -121,13 +121,13 @@ cd TradingAgents
 
 Create a virtual environment in any of your favorite environment managers:
 ```bash
-conda create -n tradingagents python=3.12
+conda create -n tradingagents python=3.13
 conda activate tradingagents
 ```
 
 Or with [uv](https://docs.astral.sh/uv/):
 ```bash
-uv venv --python 3.12
+uv venv --python 3.13
 source .venv/bin/activate
 ```