Error installing nokogiri: Failed to build gem native extension - linux

Question

I want to execute the following command
bundle install && rake install
but an error comes up and I try to figure out whats going on. I found that i need to install nokogiri. But when I try to install it an error comes up again. Any ideas? :/
sudo gem install nokogiri -v '1.8.5'
Building native extensions. This could take a while...
ERROR: Error installing nokogiri:
ERROR: Failed to build gem native extension.
current directory: /var/lib/gems/2.5.0/gems/nokogiri-1.8.5/ext/nokogiri
/usr/bin/ruby2.5 -r ./siteconf20181210-12550-orku3c.rb extconf.rb
checking if the C compiler accepts ... yes
Building nokogiri using packaged libraries.
Using mini_portile version 2.3.0
checking for gzdopen() in -lz... no
zlib is missing; necessary for building libxml2
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/usr/bin/$(RUBY_BASE_NAME)2.5
--help
--clean
--use-system-libraries
--enable-static
--disable-static
--with-zlib-dir
--without-zlib-dir
--with-zlib-include
--without-zlib-include=${zlib-dir}/include
--with-zlib-lib
--without-zlib-lib=${zlib-dir}/lib
--enable-cross-build
--disable-cross-build
To see why this extension failed to compile, please check the mkmf.log which can be found here:
/var/lib/gems/2.5.0/extensions/x86_64-linux/2.5.0/nokogiri-1.8.5/mkmf.log
extconf failed, exit code 1
Gem files will remain installed in /var/lib/gems/2.5.0/gems/nokogiri-1.8.5 for inspection.
Results logged to /var/lib/gems/2.5.0/extensions/x86_64-linux/2.5.0/nokogiri-1.8.5/gem_make.out