small buildbucket fixes

buildbucket/Dockerfile

 # To build:
 # docker build -t gitlab.ssec.wisc.edu:5555/cspp_geo/cspp-geo-gridded-glm/buildbucket:r$(date '+%Y%m%d') .
-FROM centos:7
+FROM --platform=linux/amd64 centos:7
 
 WORKDIR /work
 
@@ -12,7 +12,7 @@ RUN yum -y install which git && yum clean all
 
 # Download and install miniforge
 # https://github.com/conda-forge/miniforge#miniforge
-RUN curl -L -O https://github.com/conda-forge/miniforge/releases/latest/download/Mambaforge-$(uname)-$(uname -m).sh && \
+RUN curl -L -O "https://github.com/conda-forge/miniforge/releases/latest/download/Mambaforge-$(uname)-$(uname -m).sh" && \
     /bin/bash Mambaforge-$(uname)-$(uname -m).sh -b -p $HOME/miniforge && \
     ln -s $HOME/miniforge/etc/profile.d/conda.sh /etc/profile.d/conda.sh && \
     echo ". $HOME/miniforge/etc/profile.d/conda.sh" >> ~/.bashrc && \