feat: deploy to Frostmoln production (#3100)

Part of the dancefinder.unbound.se cutover to Frostmoln Production (infra: unboundsoftware/infra#1896, already applied).

- Replaces the AWS `deploy-prod` job (failing since CI left AWS) with `deploy-prod-frostmoln` (`deploy prod-frostmoln -n dancefinder`), as schemas did.
- Restricted securityContext (runAsNonRoot, drop ALL, seccomp RuntimeDefault) and `imagePullSecrets: oci-registry` (Platform registry).
- Switches to `nginxinc/nginx-unprivileged` (same pin as schemas-app), listening on 8080 as uid 101; the Service keeps port 80. Traefik Ingress for `/`, PDB, HPA moved to `-prod-frostmoln`; ALB Ingress dropped; Service ClusterIP.

Merging deploys to Frostmoln only; DNS still points at AWS until the cutover.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

https://claude.ai/code/session_01H6eVuR4Yt3m7TbDTDwyZJi
Reviewed-on: #3100

.gitea/workflows/ci.yaml

@@ -18,16 +18,30 @@ jobs:
       - name: Build and push
         run: unset GITEA_TOKEN && build && push
 
-  deploy-prod:
+  deploy-prod-frostmoln:
     needs: build
     if: gitea.ref == 'refs/heads/main'
     runs-on: ubuntu-latest
     env:
-      BUILDTOOLS_CONTENT: ${{ secrets.BUILDTOOLS_CONTENT }}
+      BUILDTOOLS_CONTENT: ${{ secrets.BUILDTOOLS_FROSTMOLN_PRODUCTION }}
       GITEA_REPOSITORY: ${{ gitea.repository }}
+      FM_TENANT: 9ae61342-0f76-476f-8176-e46f6b0b0c32
     environment: prod
     steps:
       - uses: actions/checkout@v7
       - uses: buildtool/setup-buildtools-action@v1
-      - name: Deploy
+      - name: Install fm
-        run: deploy prod
+        run: |
+          sudo install -d -m 0755 /etc/apt/keyrings
+          sudo curl -fsSL -o /etc/apt/keyrings/frostmoln.gpg https://get.frostmoln.cloud/deb/frostmoln.gpg
+          sudo curl -fsSL -o /etc/apt/sources.list.d/frostmoln.sources https://get.frostmoln.cloud/deb/frostmoln.sources
+          sudo apt-get update && sudo apt-get install -y fm
+      - name: Deploy to Frostmoln production
+        env:
+          FROSTMOLN_API_KEY: ${{ secrets.FROSTMOLN_PRODUCTION_DEPLOY_KEY }}
+        # The cluster API is private: the kubeconfig's exec plugin opens an fm
+        # tunnel on demand. fm reads the key from its config file, not the env.
+        run: |
+          fm auth api-key set "$FROSTMOLN_API_KEY" > /dev/null
+          fm kubernetes cluster kubeconfig ${{ vars.FROSTMOLN_PRODUCTION_CLUSTER_ID }} --exec --file "$RUNNER_TEMP/kubeconfig"
+          KUBECONFIG_CONTENT="$(cat "$RUNNER_TEMP/kubeconfig")" deploy prod-frostmoln -n dancefinder

Dockerfile

@@ -12,7 +12,7 @@ COPY . /build
 RUN npm run postinstall && npm run generate && npm run lint
 #RUN yarn start:ci & yarn wait && yarn test:cypress
 
-FROM amd64/nginx:1.31.7@sha256:227f31dac037a2f1cdbd17ca9eec940a76c6c1b3187f5285eca2c3edb5d19c31
+FROM nginxinc/nginx-unprivileged:1.31.7@sha256:94193d5c4c5df716f412bb08eb97956d98fe6b59886f0bc57d6d3a3402a88a02
 MAINTAINER Joakim Olsson <joakim@unbound.se>
 
 COPY --from=builder /build/.output/public/ /usr/share/nginx/html/

k8s/deploy.yaml

@@ -22,6 +22,13 @@ spec:
       labels:
         app.kubernetes.io/name: dancefinder-app
     spec:
+      imagePullSecrets:
+      - name: oci-registry
+      securityContext:
+        runAsNonRoot: true
+        runAsUser: 101
+        seccompProfile:
+          type: RuntimeDefault
       affinity:
         podAntiAffinity:
           preferredDuringSchedulingIgnoredDuringExecution:
@@ -36,17 +43,21 @@ spec:
               topologyKey: kubernetes.io/hostname
       containers:
       - name: dancefinder-app
+        securityContext:
+          allowPrivilegeEscalation: false
+          capabilities:
+            drop: ["ALL"]
         readinessProbe:
           httpGet:
             path: /health
-            port: 80
+            port: 8080
           initialDelaySeconds: 5
           periodSeconds: 5
           timeoutSeconds: 5
         imagePullPolicy: Always
         image: ${IMAGE}
         ports:
-        - containerPort: 80
+        - containerPort: 8080
         resources:
           requests:
             cpu: 10m
@@ -64,9 +75,8 @@ metadata:
   labels:
     app.kubernetes.io/name: dancefinder-app
 spec:
-  type: NodePort
   selector:
     app.kubernetes.io/name: dancefinder-app
   ports:
   - port: 80
-    targetPort: 80
+    targetPort: 8080

k8s/ingress-prod-frostmoln.yaml

@@ -0,0 +1,20 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: dancefinder-app
+  annotations:
+    traefik.ingress.kubernetes.io/router.entrypoints: websecure
+    traefik.ingress.kubernetes.io/router.tls.certresolver: letsencrypt
+spec:
+  ingressClassName: traefik
+  rules:
+  - host: "dancefinder.unbound.se"
+    http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: dancefinder-app
+            port:
+              number: 80

k8s/ingress-prod.yaml

@@ -1,29 +0,0 @@
-apiVersion: networking.k8s.io/v1
-kind: Ingress
-metadata:
-  name: dancefinder-app-ingress
-  annotations:
-    alb.ingress.kubernetes.io/group.name: "default"
-    alb.ingress.kubernetes.io/group.order: "101"
-    alb.ingress.kubernetes.io/scheme: internet-facing
-    alb.ingress.kubernetes.io/target-type: instance
-    alb.ingress.kubernetes.io/listen-ports: '[{"HTTP": 80},{"HTTPS": 443}]'
-    alb.ingress.kubernetes.io/ssl-redirect: "443"
-    alb.ingress.kubernetes.io/healthcheck-path: "/health"
-    alb.ingress.kubernetes.io/healthcheck-interval-seconds: "30"
-    alb.ingress.kubernetes.io/healthcheck-timeout-seconds: "5"
-    alb.ingress.kubernetes.io/healthy-threshold-count: "2"
-    alb.ingress.kubernetes.io/unhealthy-threshold-count: "2"
-spec:
-  ingressClassName: "alb"
-  rules:
-    - host: "dancefinder.unbound.se"
-      http:
-        paths:
-          - path: /*
-            pathType: ImplementationSpecific
-            backend:
-              service:
-                name: dancefinder-app
-                port:
-                  number: 80

k8s/pdb-prod-frostmoln.yaml

@@ -0,0 +1,9 @@
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: dancefinder-app
+spec:
+  minAvailable: 1
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: dancefinder-app

nginx-conf/default.conf

@@ -1,5 +1,5 @@
 server {
-    listen       80;
+    listen       8080;
     server_name  localhost;
     sendfile     off;
     charset      utf-8;