update docker python to 3.10 (#684)

also smaller image size at 1.2GB instead of 1.8GB by switching to python-slim

Dockerfile

@@ -1,21 +1,24 @@
 ### Migrations Image ###
-# pinned to a specific image chosen from https://github.com/delvtech/hyperdrive/pkgs/container/hyperdrive%2Fmigrations
-FROM ghcr.io/delvtech/hyperdrive/migrations:0.0.4 as migrations
+# pinned to a specific image chosen from https://github.com/delvtech/hyperdrive/pkgs/container/hyperdrive%2Fdevnet
+FROM ghcr.io/delvtech/hyperdrive/devnet:0.0.8 as migrations
 
 # ### Python Image ###
-FROM python:3.9.16-bullseye
-
-# set bash as default shell
-SHELL ["/bin/bash", "-c"]
+FROM python:3.10-slim
 
 WORKDIR /app
 
 # copy everything in elf-simulations
 COPY . ./
 
-# install elfpy
-RUN python -m pip install --no-cache-dir --upgrade pip
-RUN python -m pip install --no-cache-dir -e ."[with-dependencies,ape]"
+# install elfpy in one step, adding build tools, then removing them
+# https://stackoverflow.com/questions/58300046/how-to-make-lightweight-docker-image-for-python-app-with-pipenv
+RUN python -m pip install --no-cache-dir --upgrade pip && \
+  apt-get update && \
+  apt-get install -y --no-install-recommends gcc python3-dev libssl-dev git && \
+  python -m pip install --no-cache-dir -e ."[with-dependencies,ape]" && \
+  apt-get remove -y gcc python3-dev libssl-dev && \
+  apt-get autoremove -y && \
+  pip uninstall pipenv -y
 
 # copy hyperdrive contracts from migrations image
 COPY --from=migrations /src/ ./hyperdrive_solidity/