Begin visitor counter stuff

migrations/8/down.sql

@@ -0,0 +1 @@
+DROP TABLE counters;

migrations/8/up.sql

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+CREATE TABLE IF NOT EXISTS counters (
+    counter_id SERIAL PRIMARY KEY,
+    counter_name VARCHAR(64),
+    counter_value INTEGER,
+    counter_date TIMESTAMPTZ SET DEFAULT NOW()
+);
+
+INSERT INTO counters (counter_name, counter_value)
+VALUES ('visitor', 1337);