Update fixuid 0.5 and add zsh to Docker image (#2925)

ci/release-image/Dockerfile

@@ -4,6 +4,7 @@ RUN apt-get update \
  && apt-get install -y \
     curl \
     dumb-init \
+    zsh \
     htop \
     locales \
     man \
@@ -25,7 +26,7 @@ RUN adduser --gecos '' --disabled-password coder && \
   echo "coder ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers.d/nopasswd
 
 RUN ARCH="$(dpkg --print-architecture)" && \
-    curl -fsSL "https://github.com/boxboat/fixuid/releases/download/v0.4.1/fixuid-0.4.1-linux-$ARCH.tar.gz" | tar -C /usr/local/bin -xzf - && \
+    curl -fsSL "https://github.com/boxboat/fixuid/releases/download/v0.5/fixuid-0.5-linux-$ARCH.tar.gz" | tar -C /usr/local/bin -xzf - && \
     chown root:root /usr/local/bin/fixuid && \
     chmod 4755 /usr/local/bin/fixuid && \
     mkdir -p /etc/fixuid && \