Fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN11-AOM-1290331
- https://snyk.io/vuln/SNYK-DEBIAN11-AOM-1298721
- https://snyk.io/vuln/SNYK-DEBIAN11-AOM-1300249
- https://snyk.io/vuln/SNYK-DEBIAN11-LIBXML2-2413974
- https://snyk.io/vuln/SNYK-DEBIAN11-LIBXML2-2413974

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.10
+FROM python:3.10-slim
 
 WORKDIR /app