prolly wont work

cluster/apps/invidious/inv-configmap.yml

@@ -2,19 +2,19 @@
 apiVersion: v1
 kind: ConfigMap
 metadata:
-  name: invidious-config
+  name: invidious-config-template
   namespace: default
 data:
-  config.yaml: |
+  config-template.yaml: |
     db:
       dbname: invidious
       user: kemal
-      password: ${POSTGRES_PASSWORD}
+      password: "__POSTGRES_PASSWORD__"
       host: "invidious-db"
       port: 5432
     check_tables: true
     invidious_companion:
     - private_url: "http://companion:8282"
       public_url: "http://localhost:8282"
-    invidious_companion_key: ${COMPANION_KEY}
+    invidious_companion_key: "__COMPANION_KEY__"
-    hmac_key: ${HMAC_KEY}
+    hmac_key: "__HMAC_KEY__"

cluster/apps/invidious/invidious.yml

@@ -14,6 +14,39 @@ spec:
       labels:
         app: invidious
     spec:
+      initContainers:
+      - name: config-generator
+        image: busybox
+        command:
+        - sh
+        - -c
+        - |
+          sed -e "s/__POSTGRES_PASSWORD__/${POSTGRES_PASSWORD}/" \
+              -e "s/__COMPANION_KEY__/${COMPANION_KEY}/" \
+              -e "s/__HMAC_KEY__/${HMAC_KEY}/" \
+              /config-template.yaml > /config/config.yaml
+        env:
+        - name: POSTGRES_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: invidious-db-secrets
+              key: postgres-password
+        - name: COMPANION_KEY
+          valueFrom:
+            secretKeyRef:
+              name: invidious-app-secrets
+              key: companion-key
+        - name: HMAC_KEY
+          valueFrom:
+            secretKeyRef:
+              name: invidious-app-secrets
+              key: hmac-key
+        volumeMounts:
+        - name: config-template
+          mountPath: /config-template.yaml
+          subPath: config-template.yaml
+        - name: config
+          mountPath: /config
       containers:
       - name: invidious
         image: quay.io/invidious/invidious:master
@@ -43,6 +76,12 @@ spec:
             name: invidious-db-secrets
         - secretRef:
             name: invidious-app-secrets
+        volumeMounts:
+        - name: config
+          mountPath: /app/config.yaml
+          subPath: config.yaml
+        - name: logging
+          mountPath: /var/log/invidious
         ports:
         - containerPort: 3000
         livenessProbe:
@@ -53,9 +92,11 @@ spec:
           periodSeconds: 30
           timeoutSeconds: 5
           failureThreshold: 2
-        volumeMounts:
-        - name: logging
-          mountPath: /var/log/invidious
       volumes:
       - name: logging
         emptyDir: {}
+      - name: config-template
+        configMap:
+          name: invidious-config-template
+      - name: config
+        emptyDir: {}