Avoid inviting self when sending a PM from a different pnut client

Fixes #63

CHANGELOG.md

@@ -4,6 +4,11 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- Docker image
+
+### Fixed
+- Self-invite when sending a PM from a pnut app
 
 ## [1.3.0] - 2022-08-20
 ### Added

pnut-matrix.py

@@ -70,6 +70,8 @@ def new_message(msg, meta):
             invitees=[]
             for pm_user in meta['subscribed_user_ids']:
                 user = Users.query.filter(Users.pnut_user_id == pm_user).one_or_none()
+                if int(pm_user) == msg.user.id:
+                    continue
                 if user is not None:
                     invitees.append(user.matrix_id)
             if len(invitees) > 0: