Initial commit !

README.md

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+vagrant up
+vagrant ssh
+
+cd /vagrant
+crystal run src/main.cr
+
+vagrant halt

Vagrantfile

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+Vagrant.configure("2") do |config|
+    config.vm.box = "ubuntu/bionic64"
+    config.vm.network "private_network", ip: "192.168.50.50"
+    config.vm.network "forwarded_port", guest: 8000, host: 8000
+
+    config.vm.provision "shell" do |s|
+        ssh_pub_key = File.readlines("#{Dir.home}/.ssh/id_rsa.pub").first.strip
+        s.inline = <<-SHELL
+            echo #{ssh_pub_key} >> /home/vagrant/.ssh/authorized_keys
+            echo #{ssh_pub_key} >> /root/.ssh/authorized_keys
+
+            curl -fsSL https://crystal-lang.org/install.sh | sudo bash
+        SHELL
+    end
+    config.vm.provider "virtualbox" do |v|
+        v.memory = 2048
+        v.cpus = 1
+    end
+end

src/main.cr

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+puts "Hellow World !"