Rough attempt to make this more efficient

Dockerfile

@@ -1,15 +1,34 @@
-FROM ruby:3.4.3-alpine
+FROM ruby:3.4.4-alpine AS builder
 USER root
+
+RUN apk add --no-cache \
+    build-base \
+    ruby-dev \
+    libffi-dev \
+    yaml-dev
+
 WORKDIR /build
 
-COPY Gemfile /build/
-COPY *.gemspec /build/
+COPY Gemfile Gemfile.lock ./
+COPY *.gemspec ./
 
-RUN gem update \
-    && bundle config set jobs $(nproc) \
-    && bundle install
+RUN gem update --system && \
+    bundle config set jobs $(nproc) && \
+    bundle install --jobs=$(nproc) --retry=3 --without development test
 
-COPY . /build
+COPY . .
+
+FROM ruby:3.4.3-alpine
+USER root
+
+RUN apk add --no-cache \
+    libffi \
+    yaml
+
+WORKDIR /app
+
+COPY --from=builder /usr/local/bundle /usr/local/bundle
+COPY --from=builder /build /app
 
 WORKDIR /
-ENTRYPOINT [ "/build/bin/wayback_machine_downloader" ]
+ENTRYPOINT [ "/app/bin/wayback_machine_downloader" ]