feat(share, config): more variables, placeholder and reset default (#132)

* More email share vars + unfinished placeolders config

{desc} {expires} vars
(unfinished) config placeholder vals

* done

* migrate

* edit seed

* removed comments

* refactor: replace dependecy `luxon` with `moment`

* update shareRecipientsMessage message

* chore: remove `luxon`

* fix: grammatically incorrect `shareRecipientsMessage` message

* changed to defaultValue and value instead

* fix: don't expose defaultValue to non admin user

* fix: update default value if default value changes

* refactor: set config value to null instead of a empty string

* refactor: merge two migrations into one

* fix value check empty

---------

Co-authored-by: Elias Schneider <login@eliasschneider.com>

frontend/src/services/config.service.ts

@@ -23,10 +23,12 @@ const get = (key: string, configVariables: Config[]): any => {
 
   if (!configVariable) throw new Error(`Config variable ${key} not found`);
 
-  if (configVariable.type == "number") return parseInt(configVariable.value);
-  if (configVariable.type == "boolean") return configVariable.value == "true";
+  const value = configVariable.value ?? configVariable.defaultValue;
+
+  if (configVariable.type == "number") return parseInt(value);
+  if (configVariable.type == "boolean") return value == "true";
   if (configVariable.type == "string" || configVariable.type == "text")
-    return configVariable.value;
+    return value;
 };
 
 const finishSetup = async (): Promise<AdminConfig[]> => {