extract monitoring, nvidia, mailserver, cloudflared, kyverno from platform [ci skip]

Phase 2 of platform stack split. 5 more modules extracted into
independent stacks. All applied successfully with zero destroys.
Cloudflared now reads k8s_users from Vault directly to compute
user_domains. Woodpecker pipeline runs all 8 extracted stacks
in parallel. Memory bumped to 6Gi for 9 concurrent TF processes.
Platform reduced from 27 to 19 modules.

stacks/monitoring/modules/monitoring/Dockerfile

@@ -0,0 +1,27 @@
+# dockerhub: viktorbarzin/redfish-exporter
+# repo: https://pkg.go.dev/github.com/jenningsloy318/redfish_exporter#section-readme
+FROM golang:rc-bullseye AS builder
+
+LABEL maintainer="Viktor Barzin <me@viktorbarzin.me>"
+
+ARG ARCH=amd64
+
+ENV GOROOT /usr/local/go
+ENV GOPATH /go
+ENV PATH "$GOROOT/bin:$GOPATH/bin:$PATH"
+ENV GO_VERSION 1.15.2
+ENV GO111MODULE=on 
+
+
+# Build dependencies
+RUN mkdir -p /go/src/github.com/ && \
+    git clone https://github.com/jenningsloy318/redfish_exporter /go/src/github.com/jenningsloy318/redfish_exporter && \
+    cd /go/src/github.com/jenningsloy318/redfish_exporter && \
+    make build
+
+FROM golang:rc-bullseye
+
+COPY --from=builder /go/src/github.com/jenningsloy318/redfish_exporter/build/redfish_exporter /usr/local/bin/redfish_exporter
+RUN mkdir /etc/prometheus
+# config file mounter at runtime
+CMD ["/usr/local/bin/redfish_exporter", "--config.file", "/etc/prometheus/redfish_exporter.yml"]