move the stack catalogue out of the framework

stack/ and docker/ now live in the myos-stacks project (extracted with their
history). What the framework itself needs stays here:
- stack/myos/*.yml            -> share/compose/
- docker/myos/                -> share/docker/myos/
- docker/compose/             -> dropped, docker compose >= 2.24.4 is now required

Residues fixed along the way: DOCKER_IMAGES scanned a hardcoded ./docker,
include.mk filtered a hardcoded stack/*.mk, and docker-image-myos expanded an
undefined MYOS_DOCKER_IMAGES on every up/build.

README and CHANGELOG rewritten: they still documented make host,
host-certbot-* and user-config, all removed when the catalogue was split out.

share/compose/networks.yml

@@ -0,0 +1,9 @@
+networks:
+  default:
+    name: ${DOCKER_NETWORK_DEFAULT:-_default}
+  private:
+    external: true
+    name: ${DOCKER_NETWORK_PRIVATE:-docker}
+  public:
+    external: true
+    name: ${DOCKER_NETWORK_PUBLIC:-localhost}

share/compose/volumes.backup.local.yml

@@ -0,0 +1,9 @@
+version: '3.6'
+
+volumes:
+  backup:
+    driver: local
+    driver_opts:
+      device: /var/lib/backup
+      o: bind
+      type: none

share/compose/volumes.dns.local.yml

@@ -0,0 +1,9 @@
+version: '3.6'
+
+volumes:
+  dns:
+    driver: local
+    driver_opts:
+      device: /dns
+      o: bind
+      type: none

share/compose/volumes.home.local.yml

@@ -0,0 +1,9 @@
+version: '3.6'
+
+volumes:
+  home:
+    driver: local
+    driver_opts:
+      device: /home
+      o: bind
+      type: none

share/compose/volumes.log.local.yml

@@ -0,0 +1,9 @@
+version: '3.6'
+
+volumes:
+  log:
+    driver: local
+    driver_opts:
+      device: /var/log
+      o: bind
+      type: none

share/compose/volumes.www.local.yml

@@ -0,0 +1,9 @@
+version: '3.6'
+
+volumes:
+  www:
+    driver: local
+    driver_opts:
+      device: /var/www
+      o: bind
+      type: none