Replace dev playbook with tagged site playbook

Removed the `site-dev.yml` playbook in favor of tagging all included
roles in the main playbook. This way there are no 2 playbooks to keep
manually in sync and the specific roles can still be run just like from
the dev playbook by invoking the intended roles through `--tag myrole`
or `--skip-tags myskippedrole`.

site-dev.yml

@@ -1,14 +0,0 @@
----
-
-- hosts: docker_swarm_manager_node
-  roles:
-    - whoami
-    - wallabag
-    - miniflux
-    - searx
-    - traggo
-    - monica
-    - nextcloud
-    - shaarli
-    - landingpage
-    - blog

site.yml

@@ -1,21 +1,75 @@
 ---
 
 - hosts: all
-  roles:
+  tasks:
-    - system-upgrade
+    - name: Make sure system is fully upgraded
-    - docker
+      include_role: 
-    - docker-swarm
+        role: system-upgrade
+        tags: system-upgrade
+
+    - name: Make sure docker is installed
+      include_role: 
+        role: docker
+        tags: docker
+
+    - name: Make sure docker-swarm is set up
+      include_role: 
+        role: docker-swarm
+        tags: docker-swarm
 
 - hosts: docker_swarm_manager_node
-  roles:
+  tasks:
-    - caddy
+    - name: Install caddy reverse proxy
-    - whoami
+      include_role: 
-    - wallabag
+        role: caddy
-    - miniflux
+        tags: caddy
-    - searx
+
-    - traggo
+    - name: Install whoami
-    - monica
+      include_role: 
-    - nextcloud
+        role: whoami
-    - shaarli
+        tags: whoami
-    - landingpage
+
-    - blog
+    - name: Install wallabag
+      include_role: 
+        role: wallabag
+        tags: wallabag
+
+    - name: Install miniflux
+      include_role: 
+        role: miniflux
+        tags: miniflux
+
+    - name: Install searx
+      include_role: 
+        role: searx
+        tags: searx
+
+    - name: Install traggo
+      include_role: 
+        role: traggo
+        tags: traggo
+
+    - name: Install monica
+      include_role: 
+        role: monica
+        tags: monica
+
+    - name: Install nextcloud
+      include_role: 
+        role: nextcloud
+        tags: nextcloud
+
+    - name: Install shaarli
+      include_role: 
+        role: shaarli
+        tags: shaarli
+
+    - name: Install landingpage
+      include_role: 
+        role: landingpage
+        tags: landingpage
+
+    - name: Install blog
+      include_role: 
+        role: blog
+        tags: blog