Add a pre-defined server for the docker version (#413)

* Moved build to docker stage.

* Do not copy node_modules to the docker image

* Optimize Docker builds

* Lock a predefined server with enviroment variables

* Added a example docker compose file

* Removed useless layer

* Fix error with empty server type

* pass process via preload, use file, strict server check

* remove duplicate content-type

* update readme, docker compose

* bugfix: server lock false, not jellyfin

* fix preload type definition

* fix docker, web server lock check

---------

Co-authored-by: Kendall Garner <17521368+kgarner7@users.noreply.github.com>

src/renderer/types.ts

@@ -60,6 +60,17 @@ export enum ServerType {
     SUBSONIC = 'subsonic',
 }
 
+export const toServerType = (value?: string): ServerType | null => {
+    switch (value?.toLowerCase()) {
+        case ServerType.JELLYFIN:
+            return ServerType.JELLYFIN;
+        case ServerType.NAVIDROME:
+            return ServerType.NAVIDROME;
+        default:
+            return null;
+    }
+};
+
 export type ServerListItem = {
     credential: string;
     features?: Record<string, number[]>;