Updated dockerfile.

Dockerfile

@@ -1,36 +1,21 @@
-FROM haskell:9.10.2-bullseye AS builder
-
-RUN apt-get update && apt-get install -y curl git && rm -rf /var/lib/apt/lists/*
-
-RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - && \
-    apt-get install -y nodejs && \
-    rm -rf /var/lib/apt/lists/*
-
-RUN cabal update && \
-    cabal install --install-method=copy --installdir=/usr/local/bin \
-    fourmolu hlint cabal-gild
-
-WORKDIR /workspace
-
-FROM haskell:9.10.2-bullseye
+FROM haskell:9.12.2-slim-bookworm
 
 RUN apt-get update && apt-get install -y \
-    libgmp10 \
     curl \
+    git \
+    libgmp10 \
     && rm -rf /var/lib/apt/lists/*
 
+# Install Node.js
 RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - && \
     apt-get install -y nodejs && \
     rm -rf /var/lib/apt/lists/*
 
-RUN cabal update
-
-COPY --from=builder /usr/local/bin/cabal /usr/local/bin/
-COPY --from=builder /usr/local/bin/fourmolu /usr/local/bin/
-COPY --from=builder /usr/local/bin/hlint /usr/local/bin/
-COPY --from=builder /usr/local/bin/cabal-gild /usr/local/bin/
+# Install Haskell tools
+RUN cabal update && \
+    cabal install --install-method=copy --installdir=/usr/local/bin \
+    fourmolu hlint cabal-gild && \
+    rm -rf ~/.cabal/packages ~/.cabal/store
 
 WORKDIR /workspace
-
 CMD ["bash"]
-