feat: updated ruby to 2.7.1

Dockerfile

-FROM ruby:2.6.4-slim
+FROM ruby:2.7.1-slim
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
@@ -14,7 +14,6 @@ RUN apt-get update \
         build-essential \
         cmake pkg-config \
         libpq-dev \
-        nodejs \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 
@@ -26,4 +25,4 @@ USER nexus
 
 WORKDIR /app
 COPY --chown=nexus:nexus Gemfile Gemfile.lock ./
-RUN bundle config --local build.sassc --disable-march-tune-native && gem install bundler -v 1.17.3 && bundle install --jobs 20 --retry 5
\ No newline at end of file
+RUN bundle config --local build.sassc --disable-march-tune-native && gem install bundler -v 2.1 && bundle install --jobs 20 --retry 5
\ No newline at end of file

Gemfile

 source 'https://rubygems.org'
 
-ruby '2.6.4'
+ruby '2.7.1'
 
 gem 'rails', '>= 6.0.3.2'
 gem 'puma', '~> 4'