Room state synced also on the server (#20)

* wip

* wip master snapshot on the server

* wip

* server saves and fetches the content; no client involved

* wip

* content sent correctly

* save interval read from config + deleted redundant code

* room-saved event sent to room sockets

* removed redundant code related to local saving

* version bump

* npm audit fix

* removed obsolete code

* fixed bug causing the app to not start

* queue name changed

* rabbit & human review suggestions

config.yml

@@ -30,7 +30,7 @@ settings:
   # application level settings
   application:
     # queue
-    queue: ${QUEUE}:auth
+    queue: ${QUEUE}:alkemio-whiteboards
     # MILLISECONDS wait time for a response after a request on the message queue
     queue_response_timeout: ${QUEUE_RESPONSE_TIMEOUT}:10000
   # the collaboration experience
@@ -42,12 +42,7 @@ settings:
     # time is in SECONDS
     contribution_window: ${CONTRIBUTION_WINDOW}:600
     # SECONDS between auto saves
-    save_interval: ${AUTOSAVE_INTERVAL}:15
-    # SECONDS to wait for an acknowledgment that the save is successful, before retrying
-    save_timeout: ${AUTOSAVE_TIMEOUT}:20
-    # Amount of consecutive failed attempts to save before a collaborator is not picked for auto save
-    # This is useful when you want to avoid a lot of errors, or to mark a client not being reliable to save
-    save_consecutive_failed_attempts: ${SAVE_CONSECUTIVE_FAILED_ATTEMPTS}:5
+    save_interval: ${AUTOSAVE_INTERVAL}:10
     # SECONDS of inactivity before a collaborator is made view-only
     collaborator_inactivity: ${COLLABORATOR_INACTIVITY}:1800
     # how often the inactivity timer is reset;
@@ -56,4 +51,4 @@ settings:
     reset_collaborator_mode_debounce: ${INACTIVITY_DEBOUNCE}:1000
   rest:
     # the REST API
-    port: ${REST_PORT}:4005
+    port: ${REST_PORT}:4005