[TC-221]: init template-backend-service (#1)

https://eva.avroid.tech/desk/cards?obj=Task:TC-221

Начальная версия сервиса-шаблона

Co-authored-by: Nadezhda <nadezhda.lavrentieva@avroid.team>
Reviewed-on: https://git.avroid.tech/Templates/template-backend-service/pulls/1
Reviewed-by: Victor Stratov <victor.stratov@avroid.tech>

.helm/values.preprod.yaml

@@ -0,0 +1,32 @@
+replicaCount: 1
+
+extraEnv:
+  POSTGRES_USER:
+    value: "test"
+  POSTGRES_PASSWORD:
+    value: "test"
+  POSTGRES_HOST:
+    value: "cloud-postgres.avroid.cloud"
+  POSTGRES_DB:
+    value: "messenger"
+  POSTGRES_PORT:
+    value: "5432"
+
+  SCYLLADB_HOST:
+    value: "cloud-scylla.avroid.cloud"
+  SCYLLADB_PORT:
+    value: "9042"
+  SCYLLADB_USER:
+    value: "test"
+  SCYLLADB_PASSWORD:
+    value: "test"
+  SCYLLADB_KEYSPACE:
+    value: "messenger"
+
+  PORT:
+    value: "8000"
+  ENVIRONMENT:
+    value: "preprod"
+
+service:
+  port: 8000