Edit does not preserve special variables

[ryanlelek]

Issue with editing

production-notes.md

When opening and saving the file, there are changes worth noting.
Marking this down so we have a record

Note:

• the %base_url% is removed
• the comments/metadata have changed (at top)

Before:

/*
Title: Production Notes
Sort: 3
*/

When running a live site you'll want to set the `PORT` env variable to `80` so you don't need to add `:3000` to the URL.
This requires root privileges and is not recommended.

Instead it is preferred to use a reverse proxy for security reasons.
Heroku and other services handle this aspect for you, but you can implement your own reverse proxy with Nginx or Apache.
**See [Related Projects](%base_url%/related-projects) for deployment scripts to use on your own servers**

You can change the port anytime by setting the environment variable in your shell's profile, or running in-line as below:
`$ PORT=1234 npm start`

After:

---
Title: Production Notes
Sort: 3
---
When running a live site you'll want to set the `PORT` env variable to `80` so you don't need to add `:3000` to the URL.
This requires root privileges and is not recommended.

Instead it is preferred to use a reverse proxy for security reasons.
Heroku and other services handle this aspect for you, but you can implement your own reverse proxy with Nginx or Apache.
**See [Related Projects](/related-projects) for deployment scripts to use on your own servers**

You can change the port anytime by setting the environment variable in your shell's profile, or running in-line as below:
`$ PORT=1234 npm start`