update ruby version to 2.5.3

Author: flashyegis

Dockerfile

@@ -1,4 +1,4 @@
-FROM ruby:2.4
+FROM ruby:2.5.3
 RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs
 RUN mkdir /myapp
 WORKDIR /myapp

Gemfile

@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-ruby '2.4.5'
+ruby '2.5.3'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 5.2.2'

Gemfile.lock

@@ -200,7 +200,7 @@ DEPENDENCIES
   tzinfo-data
 
 RUBY VERSION
-   ruby 2.4.5p335
+   ruby 2.5.3p105
 
 BUNDLED WITH
    1.17.3