feat: add Helm chart and switch image builds to DOCR

- Add chart/ with backend, frontend, valkey deployments, services, and ingress
- Update nginx.conf to use BACKEND_URL env var via envsubst
- Update Dockerfile.frontend to use nginx template mechanism
- Build.yml: switch Docker registry from Gitea to DOCR, add helm package+push step

chart/templates/_helpers.tpl

@@ -0,0 +1,8 @@
+{{- define "lunarfront.name" -}}
+{{- .Release.Name }}
+{{- end }}
+
+{{- define "lunarfront.labels" -}}
+app.kubernetes.io/instance: {{ .Release.Name }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}

chart/templates/backend-deployment.yaml

@@ -0,0 +1,59 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ .Release.Name }}-backend
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "lunarfront.labels" . | nindent 4 }}
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: {{ .Release.Name }}-backend
+  template:
+    metadata:
+      labels:
+        app: {{ .Release.Name }}-backend
+    spec:
+      imagePullSecrets:
+        {{- toYaml .Values.imagePullSecrets | nindent 8 }}
+      containers:
+        - name: backend
+          image: "{{ .Values.backend.image.repository }}:{{ .Values.backend.image.tag }}"
+          imagePullPolicy: {{ .Values.backend.image.pullPolicy }}
+          ports:
+            - containerPort: {{ .Values.backend.port }}
+          env:
+            - name: PORT
+              value: {{ .Values.backend.port | quote }}
+            - name: NODE_ENV
+              value: production
+            - name: DATABASE_URL
+              valueFrom:
+                secretKeyRef:
+                  name: lunarfront-secrets
+                  key: database-url
+            - name: REDIS_URL
+              valueFrom:
+                secretKeyRef:
+                  name: lunarfront-secrets
+                  key: redis-url
+            - name: JWT_SECRET
+              valueFrom:
+                secretKeyRef:
+                  name: lunarfront-secrets
+                  key: jwt-secret
+          livenessProbe:
+            httpGet:
+              path: /v1/health
+              port: {{ .Values.backend.port }}
+            initialDelaySeconds: 15
+            periodSeconds: 30
+          readinessProbe:
+            httpGet:
+              path: /v1/health
+              port: {{ .Values.backend.port }}
+            initialDelaySeconds: 5
+            periodSeconds: 10
+          resources:
+            {{- toYaml .Values.backend.resources | nindent 12 }}

chart/templates/backend-service.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Release.Name }}-backend
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "lunarfront.labels" . | nindent 4 }}
+spec:
+  selector:
+    app: {{ .Release.Name }}-backend
+  ports:
+    - port: {{ .Values.backend.port }}
+      targetPort: {{ .Values.backend.port }}

chart/templates/frontend-deployment.yaml

@@ -0,0 +1,30 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ .Release.Name }}-frontend
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "lunarfront.labels" . | nindent 4 }}
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: {{ .Release.Name }}-frontend
+  template:
+    metadata:
+      labels:
+        app: {{ .Release.Name }}-frontend
+    spec:
+      imagePullSecrets:
+        {{- toYaml .Values.imagePullSecrets | nindent 8 }}
+      containers:
+        - name: frontend
+          image: "{{ .Values.frontend.image.repository }}:{{ .Values.frontend.image.tag }}"
+          imagePullPolicy: {{ .Values.frontend.image.pullPolicy }}
+          ports:
+            - containerPort: {{ .Values.frontend.port }}
+          env:
+            - name: BACKEND_URL
+              value: "http://{{ .Release.Name }}-backend:{{ .Values.backend.port }}"
+          resources:
+            {{- toYaml .Values.frontend.resources | nindent 12 }}

chart/templates/frontend-service.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Release.Name }}-frontend
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "lunarfront.labels" . | nindent 4 }}
+spec:
+  selector:
+    app: {{ .Release.Name }}-frontend
+  ports:
+    - port: 80
+      targetPort: {{ .Values.frontend.port }}

chart/templates/ingress.yaml

@@ -0,0 +1,29 @@
+{{- if .Values.ingress.host }}
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: {{ .Release.Name }}
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "lunarfront.labels" . | nindent 4 }}
+  annotations:
+    kubernetes.io/ingress.class: {{ .Values.ingress.className }}
+    cert-manager.io/cluster-issuer: {{ .Values.ingress.tlsIssuer }}
+spec:
+  ingressClassName: {{ .Values.ingress.className }}
+  tls:
+    - hosts:
+        - {{ .Values.ingress.host }}
+      secretName: {{ .Release.Name }}-tls
+  rules:
+    - host: {{ .Values.ingress.host }}
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: {{ .Release.Name }}-frontend
+                port:
+                  number: 80
+{{- end }}

chart/templates/valkey-deployment.yaml

@@ -0,0 +1,24 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ .Release.Name }}-valkey
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "lunarfront.labels" . | nindent 4 }}
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: {{ .Release.Name }}-valkey
+  template:
+    metadata:
+      labels:
+        app: {{ .Release.Name }}-valkey
+    spec:
+      containers:
+        - name: valkey
+          image: "{{ .Values.valkey.image.repository }}:{{ .Values.valkey.image.tag }}"
+          ports:
+            - containerPort: {{ .Values.valkey.port }}
+          resources:
+            {{- toYaml .Values.valkey.resources | nindent 12 }}

chart/templates/valkey-service.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Release.Name }}-valkey
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "lunarfront.labels" . | nindent 4 }}
+spec:
+  selector:
+    app: {{ .Release.Name }}-valkey
+  ports:
+    - port: {{ .Values.valkey.port }}
+      targetPort: {{ .Values.valkey.port }}