Add --cache-last-block flag

Signed-off-by: Joan E <153745173+joaniefromtheblock@users.noreply.github.com>

docs/public-networks/reference/cli/options.md

@@ -408,6 +408,48 @@ When connecting to Mainnet or public testnets, the default is a predefined list
 
 In private networks defined using [`--genesis-file`](#genesis-file) or when using [`--network=dev`](#network), the default is an empty list of bootnodes.
 
+### `cache-last-blocks`
+
+<Tabs>
+
+<TabItem value="Syntax" label="Syntax" default>
+
+```bash
+--cache-last-blocks=<INTEGER>
+```
+
+</TabItem>
+
+<TabItem value="Example" label="Example">
+
+```bash
+--cache-last-blocks=2048
+```
+
+</TabItem>
+
+<TabItem value="Environment variable" label="Environment variable">
+
+```bash
+CACHE_LAST_BLOCKS=2048
+```
+
+</TabItem>
+
+<TabItem value="Example configuration file" label="Example configuration file"> 
+
+```bash
+cache-last-blocks=2048
+```
+
+</TabItem>
+
+</Tabs>
+
+Configures the number of recent blocks to cache, significantly improving the performance of several RPC calls. 
+This caching significantly improves the performance of several RPC calls, particularly [`eth_getBlockByNumber`](../api/index.md#eth_getBlockByNumber), [`eth_getBlockByHash`](../api/index.md#eth_getBlockByHash), [`eth_getTransactionReceipt`](../api/index.md#getTransactionReceipt), and especially [`eth_feeHistory`](../api/index.md#eth_feeHistory). 
+The default is `0`.
+
 ### `color-enabled`
 
 <Tabs>