[Feature:Autograding] Add Haskell image

dockerfiles/haskell/3.0.0.0/Dockerfile

@@ -0,0 +1,14 @@
+FROM ubuntu:22.04
+
+# Install necessary packages for GHC (compiler)
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+    ghc cabal-install \
+    && rm -rf /var/lib/apt/lists/*
+
+# Maybe add Stack (another build tool for Haskell), up to Instructor?
+# RUN curl -sSL https://get.haskellstack.org/ | sh
+
+WORKDIR /usr/src/app
+
+CMD ["/bin/bash"]

dockerfiles/haskell/metadata.json

@@ -0,0 +1,3 @@
+{
+    "pushLatest": false
+}