added database readme, added file to .gitignore

database/.gitignore

@@ -0,0 +1 @@
+.env

database/README.md

@@ -1,3 +1,43 @@
 # Database
 
-TODO
+You can set environment variables either through the command line, the Nix flake (if you are running nix/NixOS), _or_ the `.env` file
+
+## Create migration database
+
+Run:
+
+```
+sqlx database create
+```
+
+Only run this if the `DATABASE_URL` environment variable is set (with the `postgres://` protocol) and if the database migration has _not_ been set up yet.
+
+## Create a new migration file
+
+Run:
+
+```
+sqlx migrate add -r <name>
+```
+
+where `<name>` is the name of the database file name given.
+
+This new migration will be placed in the `migrations/` directory.
+
+## Run the migrations
+
+Run:
+
+```
+sqlx migrate run
+```
+
+to run the _all_ migrations.
+
+To revert migraitons:
+
+```
+sqlx migrate revert
+```
+
+to rollback (all?) migrations.