added htmx, picocss postgres

database.sql

@@ -0,0 +1,13 @@
+CREATE DATABASE urlshortener;
+
+\c urlshortener
+
+CREATE TABLE IF NOT EXISTS urls(
+    id SERIAL PRIMARY KEY,
+    original_url TEXT NOT NULL,
+    short_code VARCHAR(10) UNIQUE NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    visits INTEGER DEFAULT 0
+);
+
+CREATE INDEX IF NOT EXISTS idx_short_code ON urls(short_code)