docker build error

[MariaPaypoint]

Describe the bug I'm trying to build docker image from source, but it doesn't work.

To Reproduce Steps to reproduce the behavior:

1. Go to docker-compose.yml and comment getting an image from repository and uncommented build ..
2. Run docker-compose build
3. See error

Step 6/16 : RUN make get_vendor_deps
 ---> Running in 38a0cb871af4
make: *** No rule to make target 'get_vendor_deps'.  Stop.
ERROR: Service 'minter' failed to build : The command '/bin/sh -c make get_vendor_deps' returned a non-zero code: 2

Desktop (please complete the following information):

• OS: Ubuntu 16.04
• Minter Version: 1.2.0

[danil-lashin]

Thanks for the issue! I've pushed the fix, should be OK now.