add qgis Vagrantfile

install/qgis-linux/.gitignore

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+*.log

install/qgis-linux/Vagrantfile

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+Vagrant.configure("2") do |config|
+  config.vm.box = "ubuntu/disco64"
+
+  config.vm.provider "virtualbox" do |vb|
+    vb.memory = "4096"
+  end
+  
+  # my geom: 2560x1600
+  # vncserver -geometry 1280x800 small window
+  # vncserver -geometry 1920x1200 small letters
+  config.vm.provision "shell", inline: <<-SHELL
+    mkdir -p .ssh; curl https://github.com/motiejus.keys >> .ssh/authorized_keys
+    apt-get update
+    apt-get install -y qgis \
+      openbox-lxde-session lxterminal tightvncserver
+  SHELL
+end