reordered docker container again

Dockerfile

@@ -1,5 +1,11 @@
 FROM python:3.10-slim
 
+# Debian basics and cleaning up in one RUN statement to reduce image size
+ENV GDAL_VERSION=3.7.1
+RUN apt-get update -y && \
+    apt-get install --no-install-recommends curl git gcc g++ libgdal-dev -y && \
+    rm -rf /var/lib/apt/lists/* 
+
 # To get permissions to write to the container
 RUN useradd -m -u 1000 user
 USER user
@@ -7,14 +13,8 @@ USER user
 # Define environment variables
 ENV APPS_HOME=/home/user/local/cognizant \
     ELUC_APP_HOME=/home/user/local/cognizant/eluc \
-    GDAL_VERSION=3.7.1 \
     PYTHONPATH=/home/user/local/cognizant/eluc
 
-# Debian basics and cleaning up in one RUN statement to reduce image size
-RUN apt-get update -y && \
-    apt-get install --no-install-recommends curl git gcc g++ libgdal-dev -y && \
-    rm -rf /var/lib/apt/lists/* 
-
 # Set work directory
 WORKDIR ${ELUC_APP_HOME}