c++ - What does int argc, char *argv [] mean? - Stack Overflow The variables are named argc (argument count) and argv (argument vector) by convention, but they can be given any valid identifier: int main(int num_args, char** arg_strings) is equally valid
dockerfile - How do I set environment variables during the docker . . . When building a Docker image from the commandline, you can set ARG values using –build-arg: $ docker build --build-arg some_variable_name=a_value Running that command, with the above Dockerfile, will result in the following line being printed (among others): Oh dang look at that a_value So, how does this translate to using docker-compose yml