feat(docs): CIFS/Samba in-Docker example (immich-app#15502)

* CIFS

* quotes

* quote 2

* quote 3, lol

Author: mmomjian

docs/docs/FAQ.mdx

@@ -160,6 +160,35 @@ For example, say you have existing transcodes with the policy "Videos higher tha
 
 No. Our design principle is that the original assets should always be untouched.
 
+### How can I mount a CIFS/Samba volume within Docker?
+
+If you aren't able to or prefer not to mount Samba on the host (such as Windows environment), you can mount the volume within Docker.
+Below is an example in the `docker-compose.yml`.
+
+Change your username, password, local IP, and share name, and see below where the line `- originals:/usr/src/app/originals`,
+corrolates to the section where the volume `originals` was created. You can call this whatever you like, and map it to the docker container as you like.
+For example you could change `originals:` to `Photos:`, and change `- originals:/usr/src/app/originals` to `Photos:/usr/src/app/photos`.
+
+```diff
+...
+services:
+  immich-server:
+...
+    volumes:
+      # Do not edit the next line. If you want to change the media storage location on your system, edit the value of UPLOAD_LOCATION in the .env file
+      - ${UPLOAD_LOCATION}:/usr/src/app/upload
+      - /etc/localtime:/etc/localtime:ro
++     - originals:/usr/src/app/originals
+...
+volumes:
+  model-cache:
++ originals:
++   driver_opts:
++     type: cifs
++     o: 'iocharset=utf8,username=USERNAMEHERE,password=PASSWORDHERE,rw' # change to `ro` if read only desired
++     device: '//localipaddress/sharename'
+```
+
 ---
 
 ## Albums