Add Docker image for pre-commit and dependencies

Dockerfile

@@ -0,0 +1,16 @@
+FROM python:3.11.5-alpine3.17
+COPY --from=koalaman/shellcheck:v0.9.0 /bin/shellcheck /bin/
+
+RUN apk add --update --no-cache \
+      build-base \
+      gcc \
+      ruby-full \
+      git \
+      openssh-keygen \
+    && \
+    gem install mdl --no-document && \
+    pip install pre-commit && \
+    mkdir /data && \
+    git config --global --add safe.directory /data
+
+WORKDIR /data