Enhance default page layout and add Discord support

[billyjbryant]

Description

This change enhances the layout and appearance of the default information page and adds the ability to link to a Discord Guild for Private CrewLink Servers.

Changes

src/index.ts

• Added requirement for the axios module
• Added new Environment Variable GUILD which is intended to capture the Guild ID of a Discord Guild
• If GUILD, a GET request is made via axios to the Discord API to get the Guild Information
• If Discord API returns JSON Blob, this is returned via the rendered page for calls to /
• Added support for the Page Title and Header to be set via the NAME EnvVar passed via the name variable
• Expanded the console output on server launch to be more informative.

views/index.pug

• Enhanced the overall layout of the page
• Set Page Title & H1 Header via name variable
• If Discord Guild information is provided via the discord variable, the Guild Name and Guild Invite Link rendered
• Added link to download the CrewLink Desktop application
• Added footer with Dynamic Copyright, Attribution link and License

[billyjbryant]

Can anyone review this for me please, let me know if there should be any changes?

[billyjbryant]

@ottomated can this be merged or is there any change you would like to see me make?