move database ready check into init container

manifests/deployments/pleroma.yaml

@@ -45,6 +45,17 @@ spec:
     spec:
       imagePullSecrets:
         - name: registry-credentials
+      initContainers:
+        - name: pleroma-database-wait
+          image: cr.forge.lan/darkdork-dev/pleroma
+          command: ["sh", "-c", "while ! pg_isready -U ${DB_USER} -d postgres://${DB_HOST}:${DB_PORT}/${DB_NAME} -t 1; do sleep 1s; done;"]
+          env:
+            - name: DB_HOST
+              value: postgres
+            - name: DB_NAME
+              value: pleroma
+            - name: DB_USER
+              value: pleroma
       containers:
         - name: pleroma
           image: cr.forge.lan/darkdork-dev/pleroma