Added packaging script

Update .gitignore and package-for-release.cmd

scripts/package-for-release.cmd

@@ -0,0 +1,31 @@
+@echo off
+
+pushd %CD%
+
+:: Going into the project's directory
+cd /D "%~dp0"
+call delete-pycache.cmd
+cd ..
+
+echo.
+echo Creating Release Package
+echo ------------------------
+
+echo %CD%
+
+del release.tar 2> nul
+
+7z a "release.tar" ^
+    -xr!*.pdn ^
+    -xr!*.ai ^
+    data/ ^
+    static/ ^
+    templates/ ^
+    website/ ^
+    .dockerignore ^
+    .env ^
+    app.py ^
+    Dockerfile ^
+    requirements.txt
+
+popd