app/covid-formity: enable redis password

This has already been deployed in production

Change-Id: I9c603a4985332d422d8875ecf6f8dca157f32f22
diff --git a/app/covid-formity/prod.jsonnet b/app/covid-formity/prod.jsonnet
index 25235b9..18fb845 100644
--- a/app/covid-formity/prod.jsonnet
+++ b/app/covid-formity/prod.jsonnet
@@ -41,6 +41,7 @@
         cfg+: {
             namespace: cfg.namespace,
             appName: "covid-formity",
+            password: { secretKeyRef: { name: "covid-formity", key: "redis_password" } },
             storageClassName: app.postgres.cfg.storageClassName,
         },
     },
@@ -61,6 +62,8 @@
                                 DATABASE_HOSTNAME: "postgres",
                                 DATABASE_USERNAME: app.postgres.cfg.username,
                                 DATABASE_PASSWORD: app.postgres.cfg.password,
+                                CACHE_REDIS_PASSWORD: app.redis.cfg.password,
+                                CACHE_REDIS_URL: "redis://default:$(CACHE_REDIS_PASSWORD)@redis",
                                 DATABASE_NAME: app.postgres.cfg.appName,
                                 SPACEAUTH_CONSUMER_KEY: "covid-formity",
                                 SPACEAUTH_CONSUMER_SECRET: { secretKeyRef: { name: "covid-formity", key: "oauth2_secret" } },