Update ReadMe.md

ReadMe.md

@@ -7,3 +7,39 @@
 - [ ] right now I just need to get it able to set up a new Gitea instance
 - [ ] in the future, it needs to be able to push to a new GitHub
 - [ ] need to be able to recognize/use local repos vs pulled ones
+
+## JSON format
+```json
+{
+  "mirrors": {
+    "https://github.com/": {
+      "TangentFoxy": {
+        "lua-sandbox": {
+          "private": false,
+          "target": "https://gitea.tangentfox.com/forks/lua-sandbox"
+        }
+      }
+    }
+  },
+  "repositories": {
+    "https://github.com/": {
+      "TangentFoxy": {
+        "github.io-podcasts": {
+          "description": "A Lua script to partially automate publishing a podcast on GitHub Pages."
+        }
+      }
+    }
+  }
+}
+```
+
+The idea is to make a tree based on the *source* of a repo,
+with special keys for what to do with that source,
+and optional `target` URLs for mirroring.
+- `description`: Short description typically displayed in lists on hosting services.
+- `private`: If a repo needs to be created, it will be private only if this is true.
+- `redundant`: This repo really doesn't need to exist, but hasn't been removed yet. (This is essentially for my own notes.)
+- `target`: A repo URL to force-push to for mirroring.
+- `website`: URL, usually displayed clickable on hosting services.
+
+I'm probably going to remove the artificial separation between mirros and repositories.