Move all tables into a schema

sql/schema/001_create_url_table.sql

@@ -1,5 +1,7 @@
 -- +goose Up
-CREATE TABLE urls (
+CREATE SCHEMA IF NOT EXISTS lss;
+
+CREATE TABLE lss.urls (
     url_id SERIAL PRIMARY KEY,
     long_url TEXT NOT NULL,
     short_code VARCHAR(10) UNIQUE NOT NULL,
@@ -9,8 +11,8 @@ CREATE TABLE urls (
 );
 
 -- Crucial index for lightning-fast lookups when redirecting
-CREATE INDEX idx_urls_short_code ON urls(short_code);
+CREATE INDEX idx_urls_short_code ON lss.urls(short_code);
 
 -- +goose Down
 DROP INDEX idx_urls_short_code;
-DROP TABLE urls;
+DROP TABLE lss.urls;