diff --git a/.gitignore b/.gitignore
index c0e58f5..bc13c1b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,17 @@
 node_modules
 dist
-frontend/node_modules
-frontend/dist
+.env*
+*.log
 .DS_Store
-.env.development
-.env.production
\ No newline at end of file
+
+# Backend Specific Ignore
+backend/node_modules
+backend/dist
+backend/whatsapp-session
+backend/whatsapp-chats-persist.json
+backend/all-chats-dump.json
+backend/test-api-out.json
+
+# Frontend Specific Ignore
+frontend/node_modules
+frontend/dist
\ No newline at end of file
diff --git a/database/migrations/004_whatsapp.sql b/database/migrations/004_whatsapp.sql
new file mode 100644
index 0000000..1633d32
--- /dev/null
+++ b/database/migrations/004_whatsapp.sql
@@ -0,0 +1,8 @@
+CREATE TABLE IF NOT EXISTS whatsapp_chat_atribuicoes (
+  id SERIAL PRIMARY KEY,
+  chat_id VARCHAR(255) NOT NULL,
+  user_id SERIAL REFERENCES usuarios(id) ON DELETE CASCADE,
+  area_id SERIAL REFERENCES areas(id) ON DELETE SET NULL,
+  assigned_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+  UNIQUE(chat_id)
+);