Link user id to song queue (#159)

* Added initial code for endpoint to link user id with song queue #156

* Updated songQueue to have a user_id field #156

* Added function to link user_id with songQueue record #156

* Added useful constant #156

* Finished adding code #156

Need to make the endpoint available and then write a test. Might have to modify existing tests

* Made link user id endpoint available #156

* Added TODOs for later

* Changing location of test code

* Code formatting

* Added test #156

* Formatted code

* Added user_id to SongQueue and added more related code

* Code formatting

* Fixing possible nil user_id field in SongQueue when calling a function

* Fixed another issue

* Made changes to function to also return user_id

* Making use of user_id in test requests

* Code formatting

* Updated workflow

* Forgot to include port

* Docker changes for port change

* Reverting port changes

* Cleaning up Dockerfile

* Version bump

src/callers/mod.rs

@@ -4,6 +4,7 @@ pub mod song;
 
 pub mod endpoints {
     pub const QUEUESONG: &str = "/api/v2/song/queue";
+    pub const QUEUESONGLINKUSERID: &str = "/api/v2/song/queue/link";
     pub const QUEUESONGDATA: &str = "/api/v2/song/queue/{id}";
     pub const QUEUESONGUPDATE: &str = "/api/v2/song/queue/{id}";
     pub const NEXTQUEUESONG: &str = "/api/v2/song/queue/next";
@@ -17,3 +18,7 @@ pub mod endpoints {
     pub const CREATESONG: &str = "/api/v2/song";
     pub const CREATECOVERART: &str = "/api/v2/coverart";
 }
+
+pub mod response {
+    pub const SUCCESSFUL: &str = "SUCCESSFUL";
+}