diff --git a/src/main/clj/dda/c4k_nextcloud/uberjar.clj b/src/main/clj/dda/c4k_nextcloud/uberjar.clj
index 865b92c..73c4c40 100644
--- a/src/main/clj/dda/c4k_nextcloud/uberjar.clj
+++ b/src/main/clj/dda/c4k_nextcloud/uberjar.clj
@@ -1,55 +1,15 @@
 (ns dda.c4k-nextcloud.uberjar
   (:gen-class)
   (:require
-   [clojure.spec.alpha :as s]
-   [clojure.string :as cs]
-   [clojure.tools.reader.edn :as edn]
-   [expound.alpha :as expound]
-   [dda.c4k-common.yaml :as yaml]
-   [dda.c4k-nextcloud.core :as core]
-   [dda.c4k-nextcloud.nextcloud :as nextcloud]))
-
-(def usage
-  "usage:
-  
-  c4k-nextcloud {your configuraton file} {your authorization file}")
-
-(s/def ::options (s/* #{"-h"}))
-(s/def ::filename (s/and string?
-                              #(not (cs/starts-with? % "-"))))
-(s/def ::cmd-args (s/cat :options ::options
-                         :args (s/?
-                                (s/cat :config ::filename
-                                       :auth ::filename))))
-(defn invalid-args-msg 
-  [spec args]
-  (s/explain spec args)
-  (println (str "Bad commandline arguments\n" usage)))
+   [dda.c4k-common.uberjar :as uberjar]
+   [dda.c4k-nextcloud.jitsi :as jitsi]
+   [dda.c4k-nextcloud.core :as core]))
 
 (defn -main [& cmd-args]
-  (let [parsed-args-cmd (s/conform ::cmd-args cmd-args)]
-    (if (= ::s/invalid parsed-args-cmd)
-      (invalid-args-msg ::cmd-args cmd-args)
-      (let [{:keys [options args]} parsed-args-cmd
-            {:keys [config auth]} args]
-          (cond
-            (some #(= "-h" %) options)
-            (println usage)
-            :default
-            (let [config-str (slurp config)
-                  auth-str (slurp auth)
-                  config-parse-fn (if (yaml/is-yaml? config) yaml/from-string edn/read-string)
-                  auth-parse-fn (if (yaml/is-yaml? auth) yaml/from-string edn/read-string)
-                  parsed-config (config-parse-fn config-str)
-                  parsed-auth (auth-parse-fn auth-str)
-                  config-valid? (s/valid? ::core/config parsed-config)
-                  auth-valid? (s/valid? ::core/auth parsed-auth)]
-              (if (and config-valid? auth-valid?)
-                (println (core/generate parsed-config parsed-auth))
-                (do
-                  (when (not config-valid?) 
-                    (println 
-                     (expound/expound-str ::core/config parsed-config {:print-specs? false})))
-                  (when (not auth-valid?) 
-                    (println 
-                     (expound/expound-str ::core/auth parsed-auth {:print-specs? false})))))))))))
+  (uberjar/main-common
+   "c4k-nextcloud"
+   jitsi/config?
+   jitsi/auth?
+   core/config-defaults
+   core/generate
+   cmd-args))
diff --git a/src/main/cljc/dda/c4k_nextcloud/core.cljc b/src/main/cljc/dda/c4k_nextcloud/core.cljc
index 8cd5205..a04bd42 100644
--- a/src/main/cljc/dda/c4k_nextcloud/core.cljc
+++ b/src/main/cljc/dda/c4k_nextcloud/core.cljc
@@ -1,9 +1,9 @@
 (ns dda.c4k-nextcloud.core
  (:require
-  [clojure.string :as cs]
   [clojure.spec.alpha :as s]
   #?(:clj [orchestra.core :refer [defn-spec]]
      :cljs [orchestra.core :refer-macros [defn-spec]])
+  [dda.c4k-common.common :as cm]
   [dda.c4k-common.yaml :as yaml]
   [dda.c4k-common.postgres :as postgres]
   [dda.c4k-nextcloud.nextcloud :as nextcloud]
@@ -13,22 +13,8 @@
 
 (def config-defaults {:issuer "staging"})
 
-(def config? (s/keys :req-un [::nextcloud/fqdn]
-                     :opt-un [::nextcloud/issuer 
-                              ::nextcloud/restic-repository
-                              ::nextcloud/pv-storage-size-gb 
-                              ::nextcloud/pvc-storage-class-name]))
-
-(def auth? (s/keys :req-un [::postgres/postgres-db-user ::postgres/postgres-db-password
-                            ::nextcloud/nextcloud-admin-user ::nextcloud/nextcloud-admin-password
-                            ::aws-access-key-id ::aws-secret-access-key
-                            ::restic-password]))
-
-(s/def ::config config?)
-(s/def ::auth auth?)
-
 (defn-spec k8s-objects any?
-  [config (s/merge config? auth?)]
+  [config (s/merge nextcloud/config? nextcloud/auth?)]
   (let [nextcloud-default-storage-config {:pvc-storage-class-name default-storage-class
                                           :pv-storage-size-gb 200}]
     (into
@@ -52,9 +38,9 @@
                 (yaml/to-string (backup/generate-backup-restore-deployment config))])))))
 
 (defn-spec generate any?
-  [my-config config?
-   my-auth auth?]
-  (let [resulting-config (merge config-defaults my-config my-auth)]
-    (cs/join
-     "\n---\n"
-     (k8s-objects resulting-config))))
+  [my-config nextcloud/config?
+   my-auth nextcloud/auth?]
+  (cm/concat-vec
+   (map yaml/to-string
+        (filter #(not (nil? %))
+                (merge config-defaults my-config my-auth)))))
diff --git a/src/main/cljc/dda/c4k_nextcloud/nextcloud.cljc b/src/main/cljc/dda/c4k_nextcloud/nextcloud.cljc
index 95b73d0..9566430 100644
--- a/src/main/cljc/dda/c4k_nextcloud/nextcloud.cljc
+++ b/src/main/cljc/dda/c4k_nextcloud/nextcloud.cljc
@@ -7,6 +7,7 @@
   [dda.c4k-common.yaml :as yaml]
   [dda.c4k-common.base64 :as b64]
   [dda.c4k-common.predicate :as cp]
+  [dda.c4k-common.postgres :as postgres]
   [dda.c4k-common.common :as cm]))
 
 (s/def ::fqdn cp/fqdn-string?)
@@ -21,6 +22,17 @@
                                        ::pvc-storage-class-name]
                      :opt-un [::restic-repository]))
 
+(def config? (s/keys :req-un [::fqdn]
+                     :opt-un [::issuer
+                              ::restic-repository
+                              ::pv-storage-size-gb
+                              ::pvc-storage-class-name]))
+
+(def auth? (s/keys :req-un [::postgres/postgres-db-user ::postgres/postgres-db-password
+                            ::nextcloud-admin-user ::nextcloud-admin-password
+                            ::aws-access-key-id ::aws-secret-access-key
+                            ::restic-password]))
+
 #?(:cljs
    (defmethod yaml/load-resource :nextcloud [resource-name]
      (case resource-name