create intial db, models, websocket and architecture.

migrations/schema.sql

@@ -0,0 +1,15 @@
+CREATE TABLE IF NOT EXISTS rooms (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS messages (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    room_id TEXT NOT NULL,
+    user TEXT NOT NULL,
+    text TEXT NOT NULL,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (room_id) REFERENCES rooms (id)
+);
+
+INSERT OR IGNORE INTO rooms (id, name) VALUES ('general', 'General');