invoice-ninja: Deploy Invoice Ninja

Invoice Ninja is a small business management tool.  Tabitha wants to
use it for HLC.

I am a bit concerned about the code quality of this application, and
definitely alarmed at the data it send upstream, so I have tried to be
extra careful with it.  All privileges are revoked, including access to
the Internet.

invoice-ninja/kustomization.yaml

@@ -0,0 +1,30 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: invoice-ninja
+
+labels:
+- pairs:
+    app.kubernetes.io/instance: invoice-ninja
+  includeSelectors: false
+
+resources:
+- namespace.yaml
+- secrets.yaml
+- network-policy.yaml
+- mariadb.yaml
+- invoice-ninja.yaml
+- ingress.yaml
+
+configMapGenerator:
+- name: invoice-ninja-init
+  files:
+  - init.sh
+
+- name: invoice-ninja
+  envs:
+  - invoice-ninja.env
+
+- name: nginx
+  files:
+  - nginx.conf