Adding disk-layout doc and reconsidering life choices

.gitignore

@@ -10,9 +10,6 @@
 *.log.*
 *.sig
 
-pkg/
-src/
-
 # ---> Archives
 # It's better to unpack these files and commit the raw source because
 # git has its own built in compression methods.

README.md

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 # Documentation
 
-Documentation for Kira Linux
+Documentation for Kira Linux
+
+[Documantation Index](src/index.md)

src/disk-layout.md

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+[Back to index](index.md)
+
+# Disk Layout
+
+EFI partition - FAT32
+Root partition - bcachefs
+SWAP - optional
+
+Bcachefs subvolumes:
+`/home`
+`/usr`
+`/var`
+`/var/tmp`
+
+`/usr` and `/var` supposed to be captured by snapshots
+
+`/var/tmp` - need to be excluded from snapshots so making it separate subvolume

src/index.md

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+# Documentation for Kira Linux
+
+
+[Disk Layout](disk-layout.md)
+[Update Process](updates.md)

src/updates.md

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+[Back to index](index.md)
+
+# Update process
+
+Kira Linux provides atomic (to some degree) update process that allows roll back of unsuccessful or broken updates.
+
+We achieve this by relying on bcachefs snapshots and subvolumes.
+
+The main internal routine is as follows:
+
+1. When perform update (`pacman -Su`) - pacman hook that triggers before a system upgrade by using the "When = PreTransaction" 
+ - will snapshot /usr and /var subvolumes and put snapshots to `/bzz-snaps` directory named as `bzz-usr-yyyy-mm-ddTHH-MM-SS` and `bzz-var-yyyy-mm-ddTHH-MM-SS`
+ - will create file `/var/lib/hive-up/lock`
+
+2. If update was successful, remove file `/var/lib/hive-up/lock` by another pacman hook
+
+
+6. On boot **nyanit** check file existence `/var/lib/hive-up/lock` and if it is false **nyanit** roll back latest snapshots from `/bzz-snaps` dir.
+
+7. Otherwise boot as usual.