diff --git a/.gitignore b/.gitignore
index cf3063f..8d76a70 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,17 @@
+# tools
+gtfs-sql-importer/
+
+# random things
+*.cert
+*.cer
+*.crt
+.tools
 .env
+
+# supabase
 supabase/.temp
 supabase/.branches
 node_modules/
-# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 
 # dependencies
 /node_modules
diff --git a/Justfile b/Justfile
new file mode 100644
index 0000000..c026359
--- /dev/null
+++ b/Justfile
@@ -0,0 +1,46 @@
+# other
+cert_path := ""
+prod_db_url := ""
+
+# repo settings
+tools_dir := justfile_directory() / ".tools"
+gtfs_importer_dir := tools_dir / "gtfs-sql-importer"
+gtfs_importer_repo := "https://github.com/fitnr/gtfs-sql-importer"
+
+# data urls
+straeto_schedule_data := "https://opendata.straeto.is/data/gtfs/gtfs.zip"
+straeto_dl_file := tools_dir / "straeto-gtfs.zip"
+
+# prod postgres settings
+export PGSSLROOTCERT := justfile_directory() / "prod-supabase.cer"
+export PGUSER := "postgres.yexfstvjfxhursmqcqcu"
+export PGPASSWORD := env_var("PGPASSWORD")
+export PGHOST := "aws-0-eu-central-1.pooler.supabase.com"
+export PGSSLMODE := "verify-full"
+export PGDATABASE := "postgres"
+
+@ensure_tool_dir:
+	mkdir -p {{ tools_dir }}
+
+@clone_gtfs_sql_importer: ensure_tool_dir
+	test -d {{ gtfs_importer_dir }} || git clone {{ gtfs_importer_repo }} {{ gtfs_importer_dir }}
+	cd {{ gtfs_importer_dir }} && \
+	git fetch origin master > /dev/null 2>&1 && \
+	git reset --hard origin/master > /dev/null 2>&1
+
+clean:
+	rm -f {{ straeto_dl_file }}
+
+add_indices_prod: clone_gtfs_sql_importer
+	cd {{ gtfs_importer_dir }} && make add_indices
+
+import_schedules_prod: clone_gtfs_sql_importer
+	cd {{ gtfs_importer_dir }} && make init > /dev/null 2>&1 || true
+
+	test -e {{ straeto_dl_file }} || \
+	wget {{ straeto_schedule_data }} -O {{ straeto_dl_file }}
+
+	cd {{ gtfs_importer_dir }} && make drop_notnull
+	cd {{ gtfs_importer_dir }} && make drop_constraints
+	cd {{ gtfs_importer_dir }} && make -j load GTFS="{{ straeto_dl_file }}"
+	cd {{ gtfs_importer_dir }} && make add_constraints
diff --git a/README.md b/README.md
index 9bb88c3..0054c57 100644
--- a/README.md
+++ b/README.md
@@ -19,14 +19,24 @@ How to track how late buses are:
      for bus positions.
  - [ ] Analyze actual arrival vs what the stop endpoint said about the
        arrival.
-   - Use PostGIS to compute "bus arrived" event: When bus is within X
+   - [x] Use PostGIS to compute "bus arrived" event: When bus is within X
      meters of a stop on its route, mark that as an arrival event.
+   - [ ] Sanity check potential arrivals by removing values that are weird:
+	 - [ ] Bus does not belong to the route on the stop.
+	 - [ ] Bus not lingering at stop long enough. (e.g. driver goes right past).
+	 - [ ] ???
    - Once we have bus arrival events, we can compare them to arrivals
      throughout the day.
    - We can then discard the raw bus position data, as it's not needed
      to store it: delete every raw data point between the last arrival
      and the newly computed one.
 
+Downloading route data:
+ - Fuck using GraphQL!
+ - https://straeto.is/en/about-straeto/open-data
+ - https://straeto.is/en/about-straeto/open-data/real-time-data
+ - https://github.com/public-transport/gtfs-via-postgres
+
 Arrival computation:
  - Can use edge functions for this?
  - Function takes a bus route number, start time, end time.