Increased max DB pool size

- this helps with performance because it allows requests that produce a
  large number of DB requests to fire off more requests at once

src/db.ts

@@ -12,7 +12,7 @@ export const client = Knex({
     },
     pool: {
         min: 1,
-        max: 25,
+        max: 50,
     },
 });