Add matrix-sync compose setup

resources/chaosknoten/matrix-sync/docker_compose/compose.yaml.j2

@@ -0,0 +1,19 @@
+---
+
+services:
+  sync:
+    image: git.hamburg.ccc.de/ccchh/matrix-member-sync:latest
+    command: ["uv", "run", "main.py", "sync"]
+    environment:
+      MATRIX_HOMESERVER_URL: https://matrix.hamburg.ccc.de
+      MATRIX_USER: ccchh-room-sync
+      MATRIX_ACCESS_TOKEN: {{ matrix_sync__matrix_access_token }}
+      KEYCLOAK_URL: https://id.hamburg.ccc.de
+      KEYCLOAK_REALM: ccchh
+      KEYCLOAK_CLIENT_ID: matrix-sync
+      KEYCLOAK_CLIENT_SECRET: {{ matrix_sync__keycloak_client_secret }}
+      ROOM_ATTRIBUTES: "!oLGvjHkQvheeAUPNYmsnFABg5oPsRiu5j1wMjRx7d_I=matrix-chaos,!Q2weVNy3-f1NbrS4k9DlcWf6MdPxwL3ARLcuNsVFeVs=matrix-intern"
+      MANUAL_MEMBER_LISTS: /manual-member-lists
+    restart: unless-stopped
+    volumes:
+      - ./manual-member-lists:/manual-member-lists