fix dockerfile so it can build successfully

[jiangao1]

Solved the build problem in #31

[kantancoding]

Hi, can you write a description of what the issue was and exactly what your change does and how this solves the problem?

[jiangao1]

Sure. When I run the docker build command with the existing Dockerfile in src/auth, the build fails with the error message: ERROR: failed to solve: process "/bin/sh -c pip install --no-cache-dir --requirement /app/requirements.txt"

Following the suggestions in the issue #31 by adding pkg-config, the docker build then becomes successful. docker version I have is 25.0.3

[kantancoding]

Sure. When I run the docker build command with the existing Dockerfile in src/auth, the build fails with the error message: ERROR: failed to solve: process "/bin/sh -c pip install --no-cache-dir --requirement /app/requirements.txt"

Following the suggestions in the issue #31 by adding pkg-config, the docker build then becomes successful. docker version I have is 25.0.3

I see. Thank you! Can you tell me what pkg-config does?

[jiangao1]

I'm not quite familiar with how it works, but from what I can gather, pkg-config is a tool that helps ensure compiler options are correct when compiling and linking software. It seems it helps to find where libraries are without knowing their exact path. https://www.freedesktop.org/wiki/Software/pkg-config/

[kantancoding]

I'm not quite familiar with how it works, but from what I can gather, pkg-config is a tool that helps ensure compiler options are correct when compiling and linking software. It seems it helps to find where libraries are without knowing their exact path. https://www.freedesktop.org/wiki/Software/pkg-config/

Got it! @jiangao1 Thank you!