Melissa/log 779 variables love

[melissa-hale]

reworked a lot of the variables page with the intent to make it easier to understand overall maintenance, and particular attention to reference variables.

[linear]

LOG-779 Variables & Reference Variables

Brody raised this. People have difficulty using variables

https://discord.com/channels/713503345364697088/880575219541114940/1156605062097948713

CleanShot 2023-10-18 at 12.55.362x.png

Get Brody to review since he spends a lot of time explaining

https://docs.railway.app/develop/variables

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Also address these

• FLOW - distinction between reference/templated variables
• FLOW - Types of variables should be made more clear
  • Defining
  • Types
    • Railway specific
      • Git
      • User-provided
    • Reference Variables
    • Service Discovery
• INCORRECT remove reference to Plugin Variables (LEAVE UNTIL PLUGINS ARE GONE)

[railway-app]

This PR is being deployed to Railway 🚅

[railway-app]

This PR is being deployed to Railway 🚅

🔎 meilisearch: ◻️ REMOVED
📚 railway docs: ◻️ REMOVED

[JakeCooper]

Bones are excellent

Proposed a bit of re-ordering due to the way that I personally would think about "growing my usage" of variables on railway (single variables, references, shared using references, railway provided using references)

[melissa-hale]

Thanks @JakeCooper ! super helpful feedback. I think it's a lot better now