new: [nextcloud] add many default setup and maintenance required initialization instructions

nextcloud/lib/common

@@ -78,7 +78,14 @@ get_admin_user_password() {
 
 ## only called after first install and occ is available
 nextcloud:init() {
-    occ app:disable updatenotification nextcloud_announcements
+    occ app:disable updatenotification nextcloud_announcements \; \
+        config:system:set maintenance_window_start --type=integer --value=1 \; \
+        config:system:set trusted_proxies 0 --value="0.0.0.0/0" \; \
+        db:add-missing-columns \; \
+        db:add-missing-indices \; \
+        db:add-missing-primary-keys \; \
+        maintenance:repair --include-expensive
+
 }
 
 create_occ_if_not_exists() {
@@ -114,7 +121,7 @@ create_occ_if_not_exists() {
             err "Expected last command to create /var/www/html/occ"
             return 1
         fi
-        nextcloud:init
+        nextcloud:init || return 1
     fi
 }
 
@@ -126,6 +133,9 @@ occ() {
     ## occ.batch will require /var/www/html to be populated ('occ' is
     ## supposed to exist). For that we need to make sure nextcloud have
     ## be ran and setup prior to running this next command.
+
+    ## We need here actually only the relation sql-database. Any other hook
+    ## using `occ` would make the call infinitively recursive.
     export COMPOSE_IGNORE_ORPHANS=true
     compose --debug -q --no-init --without-relation="$SERVICE_NAME":web-proxy run \
            "${occ_docker_run_opts[@]}" \

nextcloud/metadata.yml

@@ -21,6 +21,12 @@ uses:
       proxy: "Public access"
     default-options:
       target: !var-expand ${MASTER_BASE_SERVICE_NAME}:80
+      apache-custom-rules:
+        - |
+          <IfModule mod_headers.c>
+            Header always set Strict-Transport-Security "max-age=15552000; includeSubDomains; preload"
+          </IfModule>
+
   backup:
     constraint: recommended
     auto: pair