remove old Dockerfile

Dockerfile

@@ -1,42 +0,0 @@
-ARG RUBY_VERSION="3.4.3"
-FROM ruby:${RUBY_VERSION} AS base
-
-WORKDIR /app
-
-RUN <<EOT
-  apt-get update
-  gem update --system --no-document
-  gem install -N bundler
-EOT
-
-
-FROM base AS build
-
-RUN <<EOT
-  apt-get install --yes gcc make
-EOT
-
-COPY Gemfile* .
-
-RUN <<EOT
-  bundle config set --local without development
-  bundle install
-EOT
-
-
-FROM base
-
-ENV PORT=4567
-
-# RUN useradd ruby --home /app --shell /bin/sh
-RUN useradd --home /app --create-home app
-
-USER app:app
-
-COPY --from=build /usr/local/bundle /usr/local/bundle
-COPY --from=build --chown=app:app /app /app
-
-COPY --chown=app:app . .
-
-EXPOSE 4567
-CMD [ "puma", "--bind", "0.0.0.0", "--port", "$PORT" ]