Add docker and Makefiles

Dockerfile

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+FROM ruby:4.0.1 AS base
+
+RUN bundle config set frozen 'true' && \
+    bundle config set path '/vendor/bundle'
+
+WORKDIR /usr/src/app
+
+COPY Gemfile Gemfile.lock ./
+RUN bundle install
+
+COPY . .
+
+FROM base AS build-step
+RUN bundle exec jekyll build
+
+FROM scratch AS build
+COPY --from=build-step /usr/src/app/_site /
+
+FROM base AS server
+EXPOSE 4000
+CMD bundle exec jekyll serve --host 0.0.0.0 --port 4000 --destination /tmp/_site

Makefile

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+.PHONY: all build serve clean
+
+all: build
+
+build: clean
+	docker buildx build . --target build --output type=local,dest=./_site
+
+serve:
+	docker compose up --build
+
+clean:
+	rm -rf _site
+
+fmt:
+	npm run format:fix
+
+lint:
+	npm run lint:fix
+
+spellcheck:
+	npm run spellcheck:staged

docker-compose.yaml

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+services:
+  jekyll:
+    build:
+      context: .
+      target: server
+    volumes:
+      - "./:/usr/src/app"
+    ports:
+      - "4000:4000"