Update README.md

examples/n8n/README.md

@@ -1,4 +1,45 @@
 # References
 
 - https://github.com/n8n-io/n8n
-- https://github.com/n8n-io/n8n/tree/master/docker/compose/withMariaDB
+- https://github.com/n8n-io/n8n/tree/master/docker/compose/withPostgres
+
+# Notes
+
+You have to pre-supply a database init script to properly setup the postgresql database beforehand.
+
+Please follow these steps to do so:
+
+````
+# create new directory for database
+mkdir -p /mnt/docker-volumes/n8n
+
+# move the init file from this repo to the new location
+mv init-database.sh /mnt/docker-volumes/n8n/.
+
+# optional; adjust permissions
+sudo chmod -R 777 /mnt/docker-volumes/n8n/
+````
+
+Afterwards, you can proceed spawning up the docker compose stack with:
+
+````
+docker compose up
+````
+
+> [!WARNING]
+> Upon starting the stack you may see n8n errors regarding permissions:
+>
+> ````
+> [EACCES] Error Plugin: n8n: EACCES: permission denied, open '/home/node/.n8n/config'
+> ````
+>
+> You can fix those my running:
+> ````
+> sudo chmod -R 777 /mnt/docker-volumes/n8n/database
+> ````
+>
+> and restarting the stack:
+>
+> ````
+> docker compose up --force-recreate
+> ````