docker: rename resources for the stable image

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

diff --git a/docker/stable/Dockerfile b/docker/debian/Dockerfile.stable
similarity index 100%
rename from docker/stable/Dockerfile
rename to docker/debian/Dockerfile.stable

diff --git a/docker/stable/IMAGE.md b/docker/debian/IMAGE.md
similarity index 100%
rename from docker/stable/IMAGE.md
rename to docker/debian/IMAGE.md

diff --git a/docker/stable/nginx.conf b/docker/debian/nginx.conf
similarity index 100%
rename from docker/stable/nginx.conf
rename to docker/debian/nginx.conf

diff --git a/docker/stable/supervised.conf b/docker/debian/supervised.conf
similarity index 100%
rename from docker/stable/supervised.conf
rename to docker/debian/supervised.conf