Update ruby 2.4.x to 2.4.8

Mitigates the following vulnerabilities:
  - CVE-2019-16255: A code injection vulnerability of Shell#[] and
    Shell#test
  - CVE-2019-16254: HTTP response splitting in WEBrick (Additional fix)
  - CVE-2019-15845: A NUL injection vulnerability of File.fnmatch and
    File.fnmatch?
  - CVE-2019-16201: Regular Expression Denial of Service vulnerability
    of WEBrick’s Digest access authentication

Author: Jan van der Pas

2.4/alpine3.10/Dockerfile

@@ -12,8 +12,8 @@ RUN set -eux; \
 	} >> /usr/local/etc/gemrc
 
 ENV RUBY_MAJOR 2.4
-ENV RUBY_VERSION 2.4.7
-ENV RUBY_DOWNLOAD_SHA256 a249193c7e79b891a4783f951cad8160fa5fe985c385b4628db8e9913bff1f98
+ENV RUBY_VERSION 2.4.8
+ENV RUBY_DOWNLOAD_SHA256 a2a8f53ef14b891821dbbf67b081d7b9e223007a347000ff4a86a226a4708272
 ENV RUBYGEMS_VERSION 3.0.3
 
 # some of ruby's build scripts are written in ruby

2.4/alpine3.9/Dockerfile

@@ -12,8 +12,8 @@ RUN set -eux; \
 	} >> /usr/local/etc/gemrc
 
 ENV RUBY_MAJOR 2.4
-ENV RUBY_VERSION 2.4.7
-ENV RUBY_DOWNLOAD_SHA256 a249193c7e79b891a4783f951cad8160fa5fe985c385b4628db8e9913bff1f98
+ENV RUBY_VERSION 2.4.8
+ENV RUBY_DOWNLOAD_SHA256 a2a8f53ef14b891821dbbf67b081d7b9e223007a347000ff4a86a226a4708272
 ENV RUBYGEMS_VERSION 3.0.3
 
 # some of ruby's build scripts are written in ruby

2.4/buster/Dockerfile

@@ -9,8 +9,8 @@ RUN set -eux; \
 	} >> /usr/local/etc/gemrc
 
 ENV RUBY_MAJOR 2.4
-ENV RUBY_VERSION 2.4.7
-ENV RUBY_DOWNLOAD_SHA256 a249193c7e79b891a4783f951cad8160fa5fe985c385b4628db8e9913bff1f98
+ENV RUBY_VERSION 2.4.8
+ENV RUBY_DOWNLOAD_SHA256 a2a8f53ef14b891821dbbf67b081d7b9e223007a347000ff4a86a226a4708272
 ENV RUBYGEMS_VERSION 3.0.3
 
 # some of ruby's build scripts are written in ruby

2.4/stretch/Dockerfile

@@ -9,8 +9,8 @@ RUN set -eux; \
 	} >> /usr/local/etc/gemrc
 
 ENV RUBY_MAJOR 2.4
-ENV RUBY_VERSION 2.4.7
-ENV RUBY_DOWNLOAD_SHA256 a249193c7e79b891a4783f951cad8160fa5fe985c385b4628db8e9913bff1f98
+ENV RUBY_VERSION 2.4.8
+ENV RUBY_DOWNLOAD_SHA256 a2a8f53ef14b891821dbbf67b081d7b9e223007a347000ff4a86a226a4708272
 ENV RUBYGEMS_VERSION 3.0.3
 
 # some of ruby's build scripts are written in ruby