fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE319-EXPAT-6241037
- https://snyk.io/vuln/SNYK-ALPINE319-EXPAT-6241038

Dockerfile

@@ -1,6 +1,6 @@
 ARG commit_id
 
-FROM python:3.11-alpine as base
+FROM python:3.13.0a4-alpine as base
 RUN python3 -m pip install poetry
 RUN python3 -m poetry config virtualenvs.in-project true
 FROM base as build
@@ -10,7 +10,7 @@ RUN apk update
 RUN apk add --no-cache make gcc linux-headers build-base
 RUN python3 -m poetry install
 RUN apk del gcc linux-headers build-base
-FROM python:3.11-alpine as run
+FROM python:3.13.0a4-alpine as run
 ENV FOLDERISTIC_DOCKER = 1
 ENV FOLDERISTIC_COMMIT_ID = ${commit_id}
 WORKDIR /folderistic