doc: provide better clarity of supported features

Signed-off-by: Marco Cali <xmarcalx@amazon.co.uk>

Author: xmarcalx

docs/design.md

@@ -18,8 +18,8 @@ Firecracker virtual machine manager (VMM).
 
 1. Firecracker can safely run workloads from different customers on the same
    machine.
-1. Customers can create microVMs with any combination of vCPU and memory to
-   match their application requirements.
+1. Customers can create microVMs with any combination of vCPU (up to 32)
+   and memory to match their application requirements.
 1. Firecracker microVMs can oversubscribe host CPU and memory. The degree of
    oversubscription is controlled by customers, who may factor in workload
    correlation and load in order to ensure smooth host system operation.

docs/prod-host-setup.md

@@ -82,10 +82,10 @@ for Firecracker processes that are unresponsive, and kills them, by SIGKILL.
 
 ## Jailer Configuration
 
-For assuring secure isolation in production deployments, Firecracker should
-must be started using the `jailer` binary that's part of each Firecracker
-release, or executed under process constraints equal or more restrictive than
-those in the jailer. For more about Firecracker sandboxing please see
+For assuring secure isolation in production deployments, Firecracker should be
+started using the `jailer` binary that's part of each Firecracker release, or
+executed under process constraints equal or more restrictive than those in the jailer.
+For more about Firecracker sandboxing please see
 [Firecracker design](design.md)
 
 The Jailer process applies
@@ -127,7 +127,7 @@ Here are some recommendations on how to limit the process's resources:
 
 - Jailer's `resource-limit` provides control on the disk usage through:
   - `fsize` - limits the size in bytes for files created by the process
-  - `no-file` - specifies a value one greater than the maximum file
+  - `no-file` - specifies a value greater than the maximum file
     descriptor number that can be opened by the process. If not specified,
     it defaults to 4096.