added sequel and sqlite bits for the table

Gemfile

@@ -7,3 +7,5 @@ source "https://rubygems.org"
 gem "falcon", "~> 0.42.3"
 
 gem "roda", "~> 3.72"
+
+gem "sequel", "~> 5.72"

Gemfile.lock

@@ -23,6 +23,7 @@ GEM
       async
     async-pool (0.4.0)
       async (>= 1.25)
+    bigdecimal (3.1.4)
     build-environment (1.13.0)
     console (1.23.2)
       fiber-annotation
@@ -65,6 +66,8 @@ GEM
     samovar (2.2.0)
       console (~> 1.0)
       mapping (~> 1.0)
+    sequel (5.72.0)
+      bigdecimal
     timers (4.3.5)
     traces (0.11.1)
 
@@ -74,6 +77,7 @@ PLATFORMS
 DEPENDENCIES
   falcon (~> 0.42.3)
   roda (~> 3.72)
+  sequel (~> 5.72)
 
 BUNDLED WITH
    2.4.19

db/migrations/001_create_links_table.rb

@@ -0,0 +1,8 @@
+Sequel.migration do
+  change do
+    create_table :links do
+      String :url, unique: true, null: false
+      String :code, primary_key: true, unique: true, null: false
+    end
+  end
+end