Using Ubuntu 22.04 because Debian has old packages

With Debian the Quay.io security checker found several issues in the
image. With Ubuntu we have never versions of all packages and therefore
less (or no) issues.

Dockerfile

@@ -50,13 +50,13 @@ RUN export DEBIAN_FRONTEND=noninteractive \
       tini \
     && curl -sL https://nginx.org/keys/nginx_signing.key \
       > /etc/apt/trusted.gpg.d/nginx.asc && \
-    echo "deb https://packages.nginx.org/unit/debian/ bullseye unit" \
+    echo "deb https://packages.nginx.org/unit/ubuntu/ jammy unit" \
       > /etc/apt/sources.list.d/unit.list \
     && apt-get update -qq \
     && apt-get install \
       --yes -qq --no-install-recommends \
-      unit=1.27.0-1~bullseye \
-      unit-python3.9=1.27.0-1~bullseye \
+      unit=1.27.0-1~jammy \
+      unit-python3.10=1.27.0-1~jammy \
     && rm -rf /var/lib/apt/lists/*
 
 COPY --from=builder /opt/netbox/venv /opt/netbox/venv