(feat): Init concept of coming soon landing page

database.py

@@ -0,0 +1,24 @@
+import sqlite3
+
+def init_db():
+    conn = sqlite3.connect('subscribers.db')
+    cursor = conn.cursor()
+    cursor.execute("""
+        CREATE TABLE IF NOT EXISTS subscribers (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            email TEXT UNIQUE NOT NULL
+        )
+    """)
+    conn.commit()
+    conn.close()
+
+def add_email(email):
+    try:
+        conn = sqlite3.connect('subscribers.db')
+        cursor = conn.cursor()
+        cursor.execute("INSERT INTO subscribers (email) VALUES (?)", (email,))
+        conn.commit()
+        conn.close()
+        return True
+    except sqlite3.IntegrityError:
+        return False