Docker image too big about docker-asterisk

[dougbtv]

Absolutely agree, it's far too big -- do you have any interest in trying to get it working with a multi-stage build? I'd happily take a pull request that can incorporate that, it should trim it down quite significantly.

[mimusica]

Try to run all commands within 1 RUN statement. This will already decrease your image size.
And!
Once you're done with the "make" command, run:
make dist-clean
to clean up the cached files

[mimusica]

I've created a pull request with the changes I made.
Now there is only 1 RUN statement in the entire file, yet it is clean and readable
Added "yum clean all" after "yum install"
And I added a "make dist-clean" after all sources where compiled

This resulted in saving almost half the previous image size ;-).

For some (to me) unknown reason Travis failed on asterisk 14. It appears that there is no /var/log/asterisk/cdr-csv/Master.csv file created. It seems rather weird as asterisk 13 passes and the folder permissions for both are the same.
@dougbtv could you have a look at this please? And let me know if I can help.

[mimusica]

all images are just below 700MB now. If that suffices then you can close this :-)

[mimusica]

@UnAfraid the latest asterisk 16 certified lts is just under 600MB

[mimusica]

@dougbtv this can be closed

[UnAfraid]

Great, thanks!