Add Dockerfile for codesandbox

Author: pwwang

.codesandbox/Dockerfile

@@ -0,0 +1,7 @@
+FROM python:3.10.12
+
+RUN apt-get update && apt-get install -y fish && \
+    pip install -U pip && \
+    pip install poetry && \
+    poetry config virtualenvs.create false && \
+    chsh -s /usr/bin/fish