Oci runtime error docker-compose not a directory - nginx

Question

I am new to docker and currently struggling with the following problem:
After starting the command in the docker terminal:
OAUTH_CLIENT_ID=<...> OAUTH_CLIENT_SECRET=<...>
OAUTH_URL_CALLBACK=http://192.168.99.100/api/v1/auth/login docker-compose --
file test/docker-compose.yml up
I get the following error message:
ERROR: for platform Cannot start service platform: invalid header field
value "oci runtime error: container_linux.go:247: starting container process
caused \"process_linux.go:359: container init caused \\\"rootfs_linux.go:53:
mounting \\\\\\\"/c/users/m_konk01/documents/GitHub/o2r-
platform/test/nginx.conf\\\\\\\" to rootfs
\\\\\\\"/mnt/sda1/var/lib/docker/aufs/mnt/29c14c514916cf09070c6dd084bee55fa899d9
79b3f7b9521f1ab25e3a8232a0\\\\\\\" at
\\\\\\\"/mnt/sda1/var/lib/docker/aufs/mnt/29c14c514916cf09070c6dd084bee55fa899d9
79b3f7b9521f1ab25e3a8232a0/etc/nginx/nginx.conf\\\\\\\" caused \\\\\\\"not
a directory\\\\\\\"\\\"\"\n" [31mERROR[0m: Encountered errors while bringing up the project.
The docker-compose.yml starts several docker containers and contains the following platform settings:
platform:
image: nginx:latest
depends_on:
- container1
- container2
- container3
- container4
volumes:
- "./nginx.conf:/etc/nginx/nginx.conf:ro"
- "../client:/etc/nginx/html"
ports:
- "80:80"
Docker version
$ docker version
Client:
Version: 1.12.3
API version: 1.24
Go version: go1.6.3
Git commit: 6b644ec
Built: Wed Oct 26 23:26:11 2016
OS/Arch: windows/amd64
Server:
Version: 1.12.3
API version: 1.24
Go version: go1.6.3
Git commit: 6b644ec
Built: Wed Oct 26 23:26:11 2016
OS/Arch: linux/amd64
Would be happy for any ideas. My search was not successful so far.

Answer 1

it seems like you want to mount a file to a file. i remember on your docker-version its not allowed. you have to move your nginx.conf inside of your Dockerfile
Dockerfile:
....
ADD nginx.conf /tmp/
RUN mv /tmp/nginx.conf /etc/nginx/nginx.conf && \
....
this should work for you. if not show me your next error code

Answer 2

I faced similar issue due to volume mount was not worked properly.
So docker default behavior consider this /nginx.conf as directory and gives this error.
To confirm this, you can ssh into your image and go to shared directory and check the files exist or not.
Example: docker exec -it nginx sh and go to /etc/nginx/html you won't see your local files. Then you can confirm volume share was not working. you need to fix that.
If you are using windows 10 (hyper-v), first you need to share your drive and check.
However you need to find the solution to mound your shared directory first.