make app use https_proxy env variable

[darkclip]

In network restricted environment, need to use local_mode for the app to work.
However, when docker initializes, it needs to download the required dependencies, because the use of python requests package, it will not use https_proxy env variable, so, in order to make it work, need to manually copy the web_dependency.py file to the host, add proxies settings to the code, then mount it back to the docker.
So, please make the app recognize https_proxy env variable to download dependencies.