add collabora config

docker/collabora/.env.example

@@ -0,0 +1,8 @@
+######################################
+# Collabora Configuration
+######################################
+# Ref. documentation: https://sdk.collaboraonline.com/docs/installation/CODE_Docker_image.html
+COLLABORA_DOMAIN=
+COLLABORA_USERNAME=
+COLLABORA_PASSWORD=
+COLLABORA_EXTRA_PARAMS= # optional

docker/collabora/docker-compose.yml

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+name: collabora
+services:
+  app:
+    image: collabora/code
+    restart: always
+    ports:
+      - 9980:9980
+    cap_add:
+      - MKNOD
+    environment:
+      - domain=${COLLABORA_DOMAIN}
+      - username=${COLLABORA_USERNAME}
+      - password=${COLLABORA_PASSWORD}
+      - DONT_GEN_SSL_CERT="true"
+      - extra_params=${COLLABORA_EXTRA_PARAMS}
+    volumes:
+      - /etc/localtime:/etc/localtime:ro
+      - /etc/timezone:/etc/timezone:ro