Create README.md

README.md

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+# MurmurRPI
+
+It is docker image for Raspberry PI to launch `Mumble` server.
+
+## Configuration and environment
+
+Docker compose configuration:
+
+```yaml
+version: "3.4"
+
+services:
+  murmur:
+    image: insanusmokrassar/murmur
+    ports:
+      - "64738:64738"
+    environment:
+      - PUID=1000
+      - PGID=1000
+      - TZ=Europe/London
+    volumes:
+      - "/path/to/data:/etc/murmur"
+      - "/path/to/murmur.ini:/etc/murmur.ini"
+      - "/path/to/lib:/var/lib/murmur"
+    restart: unless-stopped
+
+```
+
+Here you may read more about [murmur.ini](https://wiki.mumble.info/wiki/Murmur.ini) (including `password`, `database` and other things configuration)