Fix Dockerfile and Python version

Dockerfile

@@ -1,11 +1,12 @@
 FROM docker.io/library/debian:12-slim AS builder
 RUN apt-get update && \
-    apt-get install --no-install-suggests --no-install-recommends --yes pipx
+    apt-get install --no-install-suggests --no-install-recommends --yes python3 pipx
 ENV PATH="/root/.local/bin:${PATH}"
 RUN pipx install poetry
 RUN pipx inject poetry poetry-plugin-bundle
 WORKDIR /src
 COPY . .
+RUN ln -s /usr/bin/python3 /usr/bin/python
 RUN poetry bundle venv --python=/usr/bin/python3 --only=main /venv
 
 FROM gcr.io/distroless/python3-debian12

poetry.lock

@@ -25,8 +25,10 @@ files = [
 ]
 
 [package.dependencies]
+exceptiongroup = {version = ">=1.0.2", markers = "python_version < \"3.11\""}
 idna = ">=2.8"
 sniffio = ">=1.1"
+typing_extensions = {version = ">=4.5", markers = "python_version < \"3.13\""}
 
 [package.extras]
 doc = ["Sphinx (>=8.2,<9.0)", "packaging", "sphinx-autodoc-typehints (>=1.2.0)", "sphinx_rtd_theme"]
@@ -404,6 +406,25 @@ files = [
 [package.dependencies]
 packaging = "*"
 
+[[package]]
+name = "exceptiongroup"
+version = "1.3.0"
+description = "Backport of PEP 654 (exception groups)"
+optional = false
+python-versions = ">=3.7"
+groups = ["main"]
+markers = "python_version < \"3.11\""
+files = [
+    {file = "exceptiongroup-1.3.0-py3-none-any.whl", hash = "sha256:4d111e6e0c13d0644cad6ddaa7ed0261a0b36971f6d23e7ec9b4b9097da78a10"},
+    {file = "exceptiongroup-1.3.0.tar.gz", hash = "sha256:b241f5885f560bc56a59ee63ca4c6a8bfa46ae4ad651af316d4e81817bb9fd88"},
+]
+
+[package.dependencies]
+typing-extensions = {version = ">=4.6.0", markers = "python_version < \"3.13\""}
+
+[package.extras]
+test = ["pytest (>=6)"]
+
 [[package]]
 name = "gevent"
 version = "25.5.1"
@@ -970,5 +991,5 @@ testing = ["coverage[toml]", "zope.event", "zope.testing"]
 
 [metadata]
 lock-version = "2.1"
-python-versions = ">=3.13,<4.0"
-content-hash = "1cd04a86b43b8f694998f367e70ff2b73fc51ebb0eb44eb4f05ca811d96fbc44"
+python-versions = ">=3.10,<4.0"
+content-hash = "9627c61073856a113d4be1bb089450044a1be720e2959e77f677231a74ee6421"

pyproject.toml

@@ -7,7 +7,7 @@ authors = [
 ]
 license = {text = "Apache-2.0"}
 readme = "README.md"
-requires-python = ">=3.13,<4.0"
+requires-python = ">=3.10,<4.0"
 dependencies = [
     "bottle-websocket (>=0.2.9,<0.3.0)",
     "bottleoidc (>=21.8.30,<22.0.0)",