refactor Paths and update build workflow

+ rename app_dir -> config_dir and config_dir to config_parent
+ bundle web client as zip
+ bundle and extract client zip when running pyinstaller builds
+ installer pyinstaller as main dependency
+ remove fallback client flag
+ handle already used port
+ add assethandler class
+ remove some startup logs
+ ignore wheels and client.zip files

run.py

@@ -1,16 +1,24 @@
 # Launcher script
-import swingmusic.__main__ as app
 import sys
+import zipfile
 import multiprocessing
+from pathlib import Path
+import swingmusic.__main__ as app
 
 if __name__ == "__main__":
     # this entry should only be used by pyinstaller.
-    # add freeze support here as pyinstaller uses this entry only
+    # add freeze support here as pyinstaller uses this entry
 
-    if getattr(sys, 'frozen', False) and hasattr(sys, '_MEIPASS'):
-        client = sys._MEIPASS + "/client"
-        sys.argv.extend(["--fallback-client", client])
-        sys.orig_argv.extend(["--fallback-client", client])
+    if getattr(sys, "frozen", False) and hasattr(sys, "_MEIPASS"):
+        # INFO: extract client.zip to sys._MEIPASS
+        with zipfile.ZipFile(sys._MEIPASS + "/client.zip", "r") as zip_ref:
+            zip_ref.extractall(sys._MEIPASS)
+
+        client = Path(sys._MEIPASS) / "client"
+        client_str = str(client)
+
+        sys.argv.extend(["--client", client_str])
+        sys.orig_argv.extend(["--client", client_str])
 
     multiprocessing.freeze_support()
     app.run()