Add notes on starting postgres

admin/iter1.md

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+# Iteration One
+
+Possible summary outputs.
+
+Focussing on: OSM and REPD data (FiT, and machine vision to follow).
+
+## Summaries
+
+
+
+## Ideas for matching
+

database/README.md

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+# Notes on setting up the database
+
+To run postgres as a background service and restart at login:
+```bash
+brew services start postgresql
+```
+
+To start now:
+```bash
+pg_ctl -D /usr/local/var/postgres start
+```
+