add drone ci file

.drone.yml

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+kind: pipeline
+type: kubernetes
+name: default
+
+steps:
+  - name: greeting
+    image: alpine
+    commands:
+      - echo hello
+      - echo world

chart/Chart.yaml

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+apiVersion: v2
+name: leetbot
+description: Telegram bot that counts leet points
+
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.1.0
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+# It is recommended to use it with quotes.
+appVersion: "0.1.0"

chart/templates/cm.yml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ .Release.Name }}-cm
+data:
+  TZ: {{ .Values.app.tz }}

chart/templates/deployment.yml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ .Release.Name }}
+  labels:
+    release: {{ .Release.Name }}
+spec:
+  selector:
+    matchLabels:
+      release: {{ .Release.Name }}
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        release: {{ .Release.Name }}
+    spec:
+      containers:
+        - image: {{ .Values.image.repository }}:{{ .Values.image.tag | default "latest" }}
+          name: leetbot
+          envFrom:
+            - secretRef:
+                name: {{ .Release.Name }}-token
+            - configMapRef:
+                name: {{ .Release.Name }}-cm
+          {{- if .Values.storage.enabled }}
+          volumeMounts:
+            - name: app-data
+              mountPath: '/app'
+              readOnly: false
+          {{- end }}
+      volumes:
+        {{- if .Values.storage.enabled }}
+        - name: app-data
+          persistentVolumeClaim:
+            claimName: {{ .Release.Name }}-pvc
+        {{- end }}

chart/templates/pvc.yml

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+{{- if .Values.storage.enabled }}
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: {{ .Release.Name }}-pvc
+  labels:
+    release: {{ .Release.Name }}
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: {{ .Values.storage.storageClass }}
+  resources:
+    requests:
+      storage: 1Gi
+{{- end }}

chart/templates/secret.yml

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+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ .Release.Name }}-token
+data:
+  TELEGRAM_BOT_TOKEN: {{ .Values.app.token | b64enc }}

chart/values.yaml

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+image:
+  repository: registry.local/northcode/leetbot
+
+app:
+  token: blabla
+  tz: Europe/Oslo
+
+storage:
+  enabled: true
+  storageClass: local-path