docs: Update readme and other tweaks (#37)

* edited build-main.yml to have workflow_dispatch

* re-added pgadmindata to docker compose

* removed disclaimer about being run on my personal laptop as that's no longer true

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Co-authored-by: Aster Fialla <asterfialla@gmail.com>

compose.yaml

@@ -22,4 +22,5 @@ services:
     volumes:
       - pgadmindata:/var/lib/pgadmin
 volumes:
-  pgdata:
+  pgdata:
+  pgadmindata: