Use git tag versioning for the Python project.

.gitignore

@@ -6,3 +6,4 @@ dist/
 passkey-auth.sqlite
 /passkey/frontend-build
 /test_*.py
+passkey/_version.py

pyproject.toml

@@ -1,10 +1,10 @@
 [build-system]
-requires = ["hatchling"]
+requires = ["hatchling", "hatch-vcs"]
 build-backend = "hatchling.build"
 
 [project]
 name = "passkey"
-version = "0.2.0"
+dynamic = ["version"]
 description = "Passkey Authentication for Web Services"
 authors = [
     {name = "Leo Vasanko"},
@@ -21,6 +21,12 @@ dependencies = [
 ]
 requires-python = ">=3.10"
 
+[tool.hatch.version]
+source = "vcs"
+
+[tool.hatch.build.hooks.vcs]
+version-file = "passkey/_version.py"
+
 [project.optional-dependencies]
 dev = [
     "ruff>=0.1.0",