Make local HA install public-facing

[alyoshenka]

As a developer wanting to run Home Assistant scripts from within Google Assistant, I want to make my HA install to be externally accessible with a hostname and SSL certificate because this is required for this process to work.

• Start here
• Forum question
• Forum question

Just do this with our cloud instance? Ask.

• pros: then everyone could use it
• cons: more security risk (or less perhaps?)

Completion requirements

• Contact my router company and get access credentials for port forwarding
• HA install is externally accessible with a hostname and SSL certificate
• Certificate is securely stored

Precursor to #44

[alyoshenka]

Completion Steps

1. start with manual setup documentation
   1. manage remote access
      1. secure everything
         1. configure secrets

[alyoshenka]

Might scrap or reorder if this doesn't seem like an efficient use of time.
Update: working on later because this seems pretty stinking tricky. Will probably have to do it sooner or later though.

[alyoshenka]

Scrapping because a tenant before me set up the router and I have no access to the login info.