container: pre-built Vagrant box and docker container

Change-Id: Id49a6426f52fd3e22a94fee4607b7e2a6d0a7454

vagrant/README.md

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+# Mini-NDN in [VirtualBox](https://www.virtualbox.org/) using [vagrant](https://www.vagrantup.com/).
+
+### [RECOMMENDED] Mini-NDN Vagrant Box
+
+We have a Mini-NDN pre-installed in a vagrant box. The box can be found [here](https://app.vagrantup.com/sdulal/boxes/mini-ndn). For suggested Mini-NDN resource allocation,
+Here's an example [`Vagrantfile`](https://gerrit.named-data.net/c/mini-ndn/+/6426/18/vagrant/Vagrantfile):
+```ruby
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+Vagrant.configure("2") do |config|
+  config.vm.box = "sdulal/mini-ndn"
+  config.vm.provider "virtualbox" do |vb|
+    vb.memory = "4096"
+    vb.cpus = "4"
+    vb.name = "mini-ndn-box"
+  end
+end
+```
+----
+
+### [NOT RECOMMENDED] Building from scratch with `vagrant` and VirtualBox containing Mini-NDN
+
+* Download and install VirtualBox and Vagrant
+  * https://www.vagrantup.com/downloads
+  * https://www.virtualbox.org/wiki/Downloads
+* To create and start fresh virtual machine:
+  * Create a file called "Vagrantfile" with this basic setup:
+    ```ruby
+    # -*- mode: ruby -*-
+    # vi: set ft=ruby :
+    Vagrant.configure("2") do |config|
+      config.vm.box = "bento/ubuntu-20.04"
+      config.disksize.size = '40GB'
+      config.vm.provider "virtualbox" do |vb|
+        vb.memory = 4096
+        vb.cpus = 4
+        vb.name = "mini-ndn-box"
+      end
+    end
+    ```
+  * Open your terminal or command line in the directory that has Vagrantfile
+  * Start the virtual machine with,
+    `$ vagrant up`
+  * (If required) The username/password for the vm are both `vagrant`.
+
+* To install Mini-NDN, use the following commands:
+    ```bash
+    git clone https://github.com/named-data/mini-ndn.git
+    cd mini-ndn
+    ./install.sh --source
+    ```
+* To test mini-ndn:
+    * while still in the `mini-ndn` directory, enter
+      ```bash
+      sudo python examples/mnndn.py
+      ```
+    * If it worked, You will see the Mini-NDN CLI. Enter `exit` to close the CLI.
+
+(Additional optional "not really needed" steps)
+* To clean and export vm as Vagrant Box:
+    * while in vm, enter these to clean:
+      ```bash
+      cd
+      sudo apt-get clean
+      sudo dd if=/dev/zero of=/EMPTY bs=1M
+      sudo rm -f /EMPTY
+      cat /dev/null > ~/.bash_history && history -c && exit
+      ```
+    * Close the vm window and open a terminal in the same directory as the `Vagrantfile`.
+    * In the terminal, type this command where `vb_name` is the name of the vm defined in `Vagrantfile`, and `box_name` any name for the output `.box` file
+      ```bash
+      vagrant package --base vb_name --output box_name.box
+      ```

vagrant/Vagrantfile

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+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+# This vagrant box is built with Ubuntu 20.04 basebox from bento. Mini-NDN is
+# pre-installed in this box. Recommended resource allocation for mini NDN:
+# memory = "4096" cpus = "4". However, modifiy the memory, cups and other
+# configuration as per your need.
+
+Vagrant.configure("2") do |config|
+  config.vm.box = "sdulal/mini-ndn"
+  config.vm.provider "virtualbox" do |vb|
+    vb.memory = "4096"
+    vb.cpus = "4"
+    vb.name = "mini-ndn-box"
+  end
+end