Merge pull request #1333 from TheSylex/fix-docker-build

fixed docker builds by migrating to micromamba

Dockerfile

@@ -1,23 +1,26 @@
 # See https://opendrift.github.io for usage
 
-FROM condaforge/mambaforge
+# Use a minimal base image
+FROM mambaorg/micromamba:1.4.2
 
-ENV DEBIAN_FRONTEND noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
+ENV MAMBA_DOCKERFILE_ACTIVATE=1
 
-RUN mkdir /code
-WORKDIR /code
+RUN mkdir code
+WORKDIR code
 
-# Install opendrift environment into base conda environment
+# Copy environment file
 COPY environment.yml .
-RUN mamba env update -n base -f environment.yml
+
+# Install opendrift environment into base micromamba environment
+RUN micromamba install -n base -f environment.yml
 
 # Cache cartopy maps
 RUN /bin/bash -c "echo -e \"import cartopy\nfor s in ('c', 'l', 'i', 'h', 'f'): cartopy.io.shapereader.gshhs(s)\" | python"
 
 # Install opendrift
-ADD . /code
+ADD . .
 RUN pip install -e .
 
 # Test installation
 RUN /bin/bash -c "echo -e \"import opendrift\" | python"
-