Reduce instance size from 2xlarge to xlarge (#410)

Looking at CPU, we don't need this much power.

deploy.yml

@@ -30,7 +30,7 @@ x-shared-pod-options: &shared-pod-options
 pods:
   api:
     <<: *shared-pod-options
-    instanceType: c7g.2xlarge # 8 vCPU, 16GiB, ARM, up to 15 Gbit
+    instanceType: c7g.xlarge # 4 vCPU, 8GiB, ARM, up to 12.5 Gbit
     environment:
       FNAME_REGISTRY_DOCKER_IMAGE: # Provided by deployment process after image is built
       HEALTHCHECK_CMD: "curl --connect-timeout 5 http://127.0.0.1:3000/_health"