docker: add user to a group.
docker: add user to a group.

yevheniyc/C,yevheniyc/Autodidact,yevheniyc/Autodidact,yevheniyc/Autodidact,yevheniyc/Autodidact,yevheniyc/Autodidact,yevheniyc/C,yevheniyc/Autodidact,yevheniyc/Autodidact,yevheniyc/Autodidact,yevheniyc/Autodidact