Add ssh client for ssh code checkout.

Author: psftw

8.6/Dockerfile

@@ -10,7 +10,7 @@ RUN apt-get update && \
     apt-key adv --keyserver keyserver.ubuntu.com --recv-keys BA3CBA3FFE22B574 && \
     apt-get update && \
     apt-get install -y --no-install-recommends ghc-8.6.5 cabal-install-2.4 \
-        zlib1g-dev libtinfo-dev libsqlite3-dev g++ netbase xz-utils make && \
+        zlib1g-dev libtinfo-dev libsqlite3-dev g++ netbase xz-utils make openssh-client && \
     curl -fSL https://github.com/commercialhaskell/stack/releases/download/v1.9.3/stack-1.9.3-linux-x86_64.tar.gz -o stack.tar.gz && \
     curl -fSL https://github.com/commercialhaskell/stack/releases/download/v1.9.3/stack-1.9.3-linux-x86_64.tar.gz.asc -o stack.tar.gz.asc && \
     export GNUPGHOME="$(mktemp -d)" && \

8.8/Dockerfile

@@ -10,7 +10,7 @@ RUN apt-get update && \
     apt-key adv --keyserver keyserver.ubuntu.com --recv-keys BA3CBA3FFE22B574 && \
     apt-get update && \
     apt-get install -y --no-install-recommends ghc-8.8.1 cabal-install-3.0 \
-        zlib1g-dev libtinfo-dev libsqlite3-dev g++ netbase xz-utils make && \
+        zlib1g-dev libtinfo-dev libsqlite3-dev g++ netbase xz-utils make openssh-client && \
     curl -fSL https://github.com/commercialhaskell/stack/releases/download/v2.1.3/stack-2.1.3-linux-x86_64.tar.gz -o stack.tar.gz && \
     curl -fSL https://github.com/commercialhaskell/stack/releases/download/v2.1.3/stack-2.1.3-linux-x86_64.tar.gz.asc -o stack.tar.gz.asc && \
     export GNUPGHOME="$(mktemp -d)" && \