feat(excalidraw) Add Excalidraw Helm chart

This commit adds the Excalidraw Helm chart, which includes the necessary templates and configuration files for deploying Excalidraw as a Kubernetes application. The chart includes a deployment, service, service account, and values file with default settings. This allows users to easily deploy and manage Excalidraw instances in a Kubernetes cluster.

charts/excalidraw/.helmignore

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

charts/excalidraw/Chart.yaml

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+apiVersion: v2
+name: excalidraw
+description: Virtual whiteboard for sketching hand-drawn like diagrams
+icon: https://avatars.githubusercontent.com/u/59452120?s=200&v=4
+type: application
+version: 0.2.2
+appVersion: "0.17.0"
+maintainers:
+- name: Tommy Skaug
+  email: tommy@skaug.me
+keywords:
+- kubernetes
+- drawing
+- whiteboard
+- diagramming
+- selfhosting
+sources:
+- https://github.com/excalidraw/excalidraw
+- https://excalidraw.com/

charts/excalidraw/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "excalidraw.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "excalidraw.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Common labels.
+*/}}
+{{- define "excalidraw.labels" -}}
+helm.sh/chart: {{ include "excalidraw.chart" . }}
+app.kubernetes.io/name: {{ include "excalidraw.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end -}}

charts/excalidraw/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "excalidraw.name" . }}
+  labels:
+    {{- include "excalidraw.labels" . | nindent 4 }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app: {{ include "excalidraw.name" . }}
+  template:
+    metadata:
+      labels:
+        app: {{ include "excalidraw.name" . }}
+    spec:
+      serviceAccountName: "excalidraw-sa"
+      securityContext: {}
+      containers:
+        - name: {{ .Chart.Name }}
+          securityContext: {}
+            # capabilities:
+            #   drop:
+            #   - ALL
+            # readOnlyRootFilesystem: true
+            # runAsNonRoot: true
+            # runAsUser: 1000
+
+          image: "ghcr.io/tommy-skaug/excalidraw:v0.17.0"
+          imagePullPolicy: IfNotPresent
+          ports:
+            - name: http
+              containerPort: 80
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /
+              port: http
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}

charts/excalidraw/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "excalidraw.name" . }}
+  namespace: {{ .Release.Namespace }}
+spec:
+  type: ClusterIP
+  ports:
+    - port: 80
+      targetPort: http
+      protocol: TCP
+      name: http

charts/excalidraw/templates/serviceaccount.yaml

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+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: excalidraw-sa
+  namespace: {{ .Release.Namespace }}

charts/excalidraw/values.yaml

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+replicaCount: 1
+
+resources:
+  limits:
+    cpu: 200m
+    memory: 256Mi
+  requests:
+    cpu: 20m
+    memory: 128Mi