Create tutorial for discipl-core-<platform> demonstration purposes

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Become somewhat familiar with Node.js, run Logiesbelasting use case scripts on personal hadware and/or environment and provide a public tutorial for demonstration purposes.

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reminder

Show https://www.digitalocean.com/community/tutorials/how-to-read-and-set-environmental-and-shell-variables-on-a-linux-vps with example

steven@steven-K501LX:~/Code/discipl-core-iota$ nano ~/.bashrc

# Iota full node url
# set environment variable for iota full node used with discipl node.js scripts
export IOTANODEURL="http://167.99.37.75:14265/"

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reminder

Don't forget to publish 'discipl-core-baseconnector' as npm package to prevent this error from happening.

steven@steven-K501LX:~/Code/discipl-core-uport$ npm update

npm ERR! code E404
npm ERR! 404 Not found : discipl-core-baseconnector
npm ERR! 404 
npm ERR! 404  'discipl-core-baseconnector' is not in the npm registry.
npm ERR! 404 You should bug the author to publish it (or use the name yourself!)
npm ERR! 404 
npm ERR! 404 Note that you can also install from a
npm ERR! 404 tarball, folder, http url, or git url.

Where the dsicipl-core-baseconnector isn't published yet, we need to define dependencies with proper git source(s).

Add to the package.json file:

"dependencies": {
    "discipl-core-baseconnector": "git+https://github.com/discipl/discipl-core-baseconnector.git"
  }

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reminder

With an error such as: Error: Cannot find module 'uport-connect'

steven@steven-K501LX:~/Code/discipl-core-uport$ npm i --save uport-connect

Git status will look something like:

steven@steven-K501LX:~/Code/discipl-core-uport$ git status
On branch master
Your branch is up to date with 'origin/master'.

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git checkout -- <file>..." to discard changes in working directory)

	modified:   package-lock.json
	modified:   package.json

no changes added to commit (use "git add" and/or "git commit -a")

Git add, commit and push is what's left:

steven@steven-K501LX:~/Code/discipl-core-uport$ git add .
steven@steven-K501LX:~/Code/discipl-core-uport$ git commit -m 'save uport-connect dependency'
[master 2674b29] save uport-connect dependency
 2 files changed, 300 insertions(+), 296 deletions(-)
steven@steven-K501LX:~/Code/discipl-core-uport$ git push
Counting objects: 4, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (4/4), done.
Writing objects: 100% (4/4), 3.01 KiB | 3.01 MiB/s, done.
Total 4 (delta 3), reused 0 (delta 0)
remote: Resolving deltas: 100% (3/3), completed with 3 local objects.
To github.com:discipl/discipl-core-uport.git
   ba4472a..2674b29  master -> master
steven@steven-K501LX:~/Code/discipl-core-uport$ 

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Reminder

Notes for installing & running IPv8 connector tests

1. Clone Tribler Python implementation of the IPv8 layer

steven@steven-K501LX:~/Code$ git clone https://github.com/Tribler/py-ipv8.git
Cloning into 'py-ipv8'...
remote: Counting objects: 2901, done.
remote: Compressing objects: 100% (14/14), done.
remote: Total 2901 (delta 4), reused 4 (delta 0), pack-reused 2887
Receiving objects: 100% (2901/2901), 667.38 KiB | 1.30 MiB/s, done.
Resolving deltas: 100% (1997/1997), done.

2. Install pip if not already done

steven@steven-K501LX:~/Code/py-ipv8$ sudo apt install python-pip *(note the error!)*

3. Install dependencies for IPv8

steven@steven-K501LX:~/Code/py-ipv8$ pip install --upgrade -r requirements.txt
Collecting cryptography>=2.3dev1 (from -r requirements.txt (line 1))
  Downloading https://files.pythonhosted.org/packages/87/e6/915a482dbfef98bbdce6be1e31825f591fc67038d4ee09864c1d2c3db371/cryptography-2.3.1-cp27-cp27mu-manylinux1_x86_64.whl (2.1MB)
    100% |████████████████████████████████| 2.1MB 453kB/s 
Collecting libnacl>=1.6.1 (from -r requirements.txt (line 2))
  Downloading https://files.pythonhosted.org/packages/60/55/0ce2a0b37264b8ec2be2765fdeefc5e7991b54f78bc9142120fa3f352782/libnacl-1.6.1-py2.py3-none-any.whl
Collecting netifaces (from -r requirements.txt (line 3))
  Downloading https://files.pythonhosted.org/packages/70/dd/411bb4cda549136cf9ff5dbd4f33f898fd90b25ac73fd4ea42a3d3e8fd15/netifaces-0.10.7-cp27-cp27mu-manylinux1_x86_64.whl
Collecting networkx (from -r requirements.txt (line 4))
  Downloading https://files.pythonhosted.org/packages/11/42/f951cc6838a4dff6ce57211c4d7f8444809ccbe2134179950301e5c4c83c/networkx-2.1.zip (1.6MB)
    100% |████████████████████████████████| 1.6MB 481kB/s 
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
    ImportError: No module named setuptools
    
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-dVoV7N/networkx/

About the error: setuptools do not appear to be installed. Follow the Installation Instructions from the PyPI website.

4. The libsodium package will have to be installed manually. (note the error!)

steven@steven-K501LX:~/Code/py-ipv8$ sudo apt-get install libsodium18
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package libsodium18

Sounds like How To Install the Django Web Framework on Ubuntu 14.04 from Digital Ocean is a better option to follow installing python.