Resurrect some Dockerfiles

Add missing black and rustfmt

docker/alpine.Dockerfile

@@ -3,6 +3,7 @@ LABEL org.opencontainers.image.source=https://github.com/fish-shell/fish-shell
 
 ENV LANG=C.UTF-8
 ENV LC_ALL=C.UTF-8
+ENV PIP_ROOT_USER_ACTION=ignore
 
 RUN apk add --no-cache \
     bash \
@@ -14,11 +15,15 @@ RUN apk add --no-cache \
     musl-dev \
     pcre2-dev \
     py3-pexpect \
+    py3-pip \
     python3 \
     rust \
+    rustfmt \
     sudo \
     tmux
 
+RUN pip install --break-system-packages black
+
 RUN addgroup -g 1000 fishuser
 
 RUN adduser \

docker/jammy.Dockerfile

@@ -19,9 +19,12 @@ RUN apt-get update \
     rustc \
     sudo \
     tmux \
+    python3-pip \
   && locale-gen en_US.UTF-8 \
   && apt-get clean
 
+RUN pip install black
+
 RUN groupadd -g 1000 fishuser \
   && useradd -p $(openssl passwd -1 fish) -d /home/fishuser -m -u 1000 -g 1000 fishuser \
   && adduser fishuser sudo \