feat: add kubernetes deployment with kustomize (thomiceli#258)

Signed-off-by: Guilhem Lettron <guilhem@barpilot.io>

deploy/README.md

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+# kustomize
+
+## Simple
+
+`kustomization.yaml`:
+
+```yaml
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+metadata:
+  name: opengist
+
+resources:
+  - https://github.com/thomiceli/opengist/deploy/
+```
+
+## Full example
+
+`kustomization.yaml`:
+
+```yaml
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+metadata:
+  name: opengist
+
+namespace: opengist
+
+resources:
+  - namespace.yaml
+  - https://github.com/thomiceli/opengist/deploy/?ref:v1.7.1
+
+images:
+  - name: ghcr.io/thomiceli/opengist
+    newTag: 1.7.1
+
+patches:
+  # Add your ingress
+  - path: ingress.yaml
+  - patch: |-
+      - op: add
+        path: /spec/rules/0/host
+        value: opengist.mydomain.com
+    target:
+      group: networking.k8s.io
+      version: v1
+      kind: Ingress
+      name: opengist
+```
+
+`namespace.yaml`:
+
+```yaml
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: opengist
+```
+
+`ingress.yaml`:
+
+```yaml
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: opengist
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-production
+spec:
+  ingressClassName: nginx
+  tls:
+    - hosts:
+        - opengist.mydomain.com
+      secretName: opengist-tls
+```

deploy/deployment.yaml

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+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: opengist
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: opengist
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: opengist
+    spec:
+      containers:
+        - name: opengist
+          image: ghcr.io/thomiceli/opengist
+          ports:
+            - name: http
+              containerPort: 6157
+            - name: ssh
+              containerPort: 2222
+          volumeMounts:
+            - mountPath: /opengist
+              name: data
+      volumes:
+        - name: data
+          persistentVolumeClaim:
+            claimName: opengist-data

deploy/ingress.yaml

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+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: opengist
+  labels:
+    app.kubernetes.io/name: opengist
+    app.kubernetes.io/component: ingress
+spec:
+  rules:
+    - host: opengist.local
+      http:
+        paths:
+          - pathType: Prefix
+            path: "/"
+            backend:
+              service:
+                name: opengist
+                port:
+                  name: http

deploy/kustomization.yaml

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+---
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+metadata:
+  name: opengist
+
+resources:
+  - deployment.yaml
+  - pvc.yaml
+  - ingress.yaml
+  - service.yaml

deploy/pvc.yaml

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+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: opengist-data
+  labels:
+    app.kubernetes.io/name: opengist
+    app.kubernetes.io/component: data
+spec:
+  resources:
+    requests:
+      storage: 1Gi
+  volumeMode: Filesystem
+  accessModes:
+    - ReadWriteOnce

deploy/service.yaml

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+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: opengist
+  labels:
+    app.kubernetes.io/name: opengist
+spec:
+  selector:
+    app.kubernetes.io/name: opengist
+  ports:
+    - port: 80
+      targetPort: http
+      name: http