Found workaround for buster v bullseye error

rstudio/plumber#459

misc/Dockerfile

@@ -1,6 +1,9 @@
 FROM trestletech/plumber
 MAINTAINER Docker User <docker@user.org>
 
+# Workaround to address buster vs. bullseye codebase name
+RUN echo 'deb http://deb.debian.org/debian bullseye main' > /etc/apt/sources.list
+
 RUN apt-get update -qq && apt-get install -y \
   git-core \
   libssl-dev \
@@ -9,7 +12,7 @@ RUN apt-get update -qq && apt-get install -y \
   libxml2-dev \
   libpq-dev -y
 
-#RUN R CMD javareconf
+RUN R CMD javareconf
 
 RUN R -e "install.packages('devtools')"
 RUN R -e 'devtools::install_github("fdrennan/plumberAPI")'