Replace rails image (deprecated) with one based on ruby

Author: jamezrin

.ruby-version

@@ -1 +1 @@
-2.7.1
+2.7.4

Dockerfile

@@ -1 +1,13 @@
-FROM rails:onbuild
+FROM ruby:2.7.4
+
+RUN curl -fsSL https://deb.nodesource.com/setup_12.x | bash -
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential libpq-dev libmariadb-dev sqlite3 libsqlite3-dev nodejs
+
+WORKDIR /usr/src/app
+COPY Gemfile* ./
+RUN bundle install
+COPY . .
+
+EXPOSE 3000
+CMD ["rails", "server", "-b", "0.0.0.0"]