add sqlite db

pilot/database/connection/postgres.py

@@ -0,0 +1,22 @@
+import psycopg2
+from peewee import PostgresqlDatabase
+from psycopg2.extensions import quote_ident
+from database.config import DB_NAME, DB_HOST, DB_PORT, DB_USER, DB_PASSWORD
+
+def get_postgres_database():
+    return PostgresqlDatabase(DB_NAME, user=DB_USER, password=DB_PASSWORD, host=DB_HOST, port=DB_PORT)
+
+def create_postgres_database():
+    conn = psycopg2.connect(
+        dbname='postgres',
+        user=DB_USER,
+        password=DB_PASSWORD,
+        host=DB_HOST,
+        port=DB_PORT
+    )
+    conn.autocommit = True
+    cursor = conn.cursor()
+    safe_db_name = quote_ident(DB_NAME, conn)
+    cursor.execute(f"CREATE DATABASE {safe_db_name}")
+    cursor.close()
+    conn.close()