Add docker stuff

.dockerignore

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+log/*
+tmp/*
+Dockerfile

Dockerfile

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+FROM ruby:3.1.2-alpine
+
+RUN apk add build-base libpq-dev tzdata
+
+WORKDIR /app
+ADD Gemfile* ./
+
+RUN bundle
+
+ADD . ./
+
+CMD ["./entrypoint.sh"]

entrypoint.sh

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+#!/usr/bin/env sh
+
+bin/rails db:migrate &&
+bin/rails server