feat: systemd timery + skripty pro udrzbu serveru

Skripty (4):
- update.sh: apt update + upgrade + restart kdyz nutny + Telegram
- docker-update.sh: docker compose pull + up -d pro vsechny sluzby
- docker-zalohy.sh: tar.zst zaloha data/ adresaru na NAS
- server-report.sh: denni Telegram report (uptime, RAM, disk, Docker)

Systemd (8 - 4x service + 4x timer):
- docker-update: kazdou sobotu 18:00
- docker-zalohy: kazde utery 20:00
- server-report: kazdy den 09:30
- update-rpi: kazdy patek 18:00

Konfigurace:
- conf/telegram.conf.example: sablona pro Telegram credentials
- vsechny skripty ctou z /home/<user>/.telegram.conf (chmod 600)

Poznamka:
- vsechny cesty (/home/mates) a hostname jsou pevne v service souborech
- pro jineho uzivatele uprav User=, WorkingDirectory=, ExecStart=
- zadne IP adresy, tokeny ani PII v gitu

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 mates
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.