docs: add install/config tips

README.md

@@ -1,3 +1,23 @@
 # cobble
 
 👞 A simple SQL migration utility
+
+## Installing
+
+Through `go`, the tool can be installed via:
+
+```bash
+go install forge.karnov.club/marc/cobble
+```
+
+## Configuring
+
+Connection details about the database to apply migrations on can be provided via environment variables:
+
+```bash
+DB_HOST=...         # Database host
+DB_PORT=...         # Database port
+DB_APP_USER=...     # Username to connect with when applying migrations
+DB_APP_PASSWORD=... # Password to use to connect as $DB_APP_USER
+DB_NAME=...         # Database name to apply migrations on
+```