Merge pull request 'dev' (#10) from dev into master

Reviewed-on: #10

db/db.py

@@ -44,6 +44,7 @@ class Database:
             try:
                 self.cursor.execute(
                     """INSERT INTO activity(
+                       id,
                        description,
                        time_spent,
                        date_start,
@@ -54,8 +55,9 @@ class Database:
                        task_id,
                        project_id,
                        author_id
-                    ) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?)""",
+                    ) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)""",
                     (
+                        act.id,
                         act.description,
                         act.time_spent,
                         act.date_start,