only use one build stage in Dockerfile. natcap#1560

docker/Dockerfile

@@ -4,10 +4,10 @@
 FROM debian:12.2 as build
 ARG INVEST_VERSION="main"
 ARG INVEST_REPO="natcap/invest"
-RUN apt update && apt install -y python3 python3-dev python3-pip python3-build build-essential git python3.11-venv
 
 # Create the container for distribution that has runtime dependencies.
 FROM mambaorg/micromamba:1.5.0-bookworm-slim
+RUN apt update && apt install -y git
 RUN cd / && \
         git clone https://github.com/${INVEST_REPO}.git && \
         cd $(basename ${INVEST_REPO}) && \