Clean intermediate files to reduce image size

Dockerfile

@@ -1,10 +1,11 @@
-# Build the C, C++, Fortran, and Python BMI specifications from a Mambaforge (Linux/Ubuntu) image.
+# Build the C, C++, Fortran, and Python BMI specifications in a Mambaforge (Linux/Ubuntu) image.
 FROM condaforge/mambaforge:24.3.0-0
 
 LABEL author="Mark Piper"
 LABEL email="[email protected]"
 
-RUN mamba install -y make cmake c-compiler cxx-compiler fortran-compiler pkg-config "numpy<2"
+RUN mamba install -y make cmake c-compiler cxx-compiler fortran-compiler pkg-config "numpy<2" && \
+    mamba clean --all
 
 ENV base_url=https://github.com/csdms
 
@@ -15,7 +16,8 @@ RUN git clone --branch v${version} ${base_url}/${package} ${prefix}
 WORKDIR ${prefix}/_build
 RUN cmake .. -DCMAKE_INSTALL_PREFIX=${CONDA_DIR} && \
     make && \
-    make install
+    make install && \
+    make clean
 
 ENV package=bmi-cxx
 ENV version="2.0.2"
@@ -24,7 +26,8 @@ RUN git clone --branch v${version} ${base_url}/${package} ${prefix}
 WORKDIR ${prefix}/_build
 RUN cmake .. -DCMAKE_INSTALL_PREFIX=${CONDA_DIR} && \
     make && \
-    make install
+    make install && \
+    make clean
 
 ENV package=bmi-fortran
 ENV version="2.0.2"
@@ -33,7 +36,8 @@ RUN git clone --branch v${version} ${base_url}/${package} ${prefix}
 WORKDIR ${prefix}/_build
 RUN cmake .. -DCMAKE_INSTALL_PREFIX=${CONDA_DIR} && \
     make && \
-    make install
+    make install && \
+    make clean
 
 ENV package=bmi-python
 ENV version="2.0.1"