Added the haskell library "silently" for capturing io so that i can actually use Magnes tests.

Dockerfile

@@ -31,6 +31,7 @@ RUN cabal update \
     && cabal install --lib tasty-ant-xml \
     && cabal install --lib bytestring \
     && cabal install --lib tasty-html \
+    && cabal install --lib silently \
     ; rm -f .cabal/packages/hackage.haskell.org/01-*
 COPY --chown=curry:curry . /home/curry/
 CMD ["/home/curry/run-tests", "setup", "compile", "test"]