docs: erpc (#76)

* docs: erpc

* docs: erpc guide

* docs: fix comment

documentation/docs/pages/docs/references/rpc-node-providers.mdx

@@ -33,4 +33,64 @@ You can use [chainlist](https://chainlist.org/) to find all the providers which
 
 ## Local nodes
 
-rindexer should work with any local nodes you run including [Anvil](https://book.getfoundry.sh/anvil/) and [Hardhat](https://hardhat.org/)
+rindexer should work with any local nodes you run including [Anvil](https://book.getfoundry.sh/anvil/) and [Hardhat](https://hardhat.org/)
+
+# RPC Proxy and Caching
+
+[eRPC](https://github.com/erpc/erpc) is a fault-tolerant EVM RPC proxy and re-org aware permanent caching solution. It is built with read-heavy use-cases in mind such as data indexing and high-load frontend usage.
+
+## Quickstart
+
+1. Create your [`erpc.yaml`](https://docs.erpc.cloud/config/example) configuration file:
+
+```yaml filename="erpc.yaml"
+logLevel: debug
+projects:
+  - id: main
+    upstreams:
+      # You don't need to define architecture (e.g. evm) or chain id (e.g. 137)
+      # as they will be detected automatically by eRPC.
+      - endpoint: https://eth-mainnet.blastapi.io/xxxx
+      - endpoint: https://polygon-mainnet.blastapi.io/xxxx
+      - endpoint: evm+alchemy://xxxx-my-alchemy-api-key-xxxx
+```
+
+See [a complete config example](https://docs.erpc.cloud/config/example) for inspiration.
+
+2. Use the Docker image:
+
+```bash
+docker run -v $(pwd)/erpc.yaml:/root/erpc.yaml -p 4000:4000 -p 4001:4001 ghcr.io/erpc/erpc:latest
+```
+
+or add the below configs to the rindexer's [docker-compose.yaml](https://github.com/joshstevens19/rindexer/blob/master/docker-compose.yml) as a service and run `docker-compose up -d`:
+
+```yaml [rindexer.yaml]
+  services:
+    ...
+
+    erpc: // [!code focus]
+      image: ghcr.io/erpc/erpc:latest // [!code focus]
+      platform: linux/amd64 // [!code focus]
+      volumes: // [!code focus]
+        - ${PROJECT_PATH}/erpc.yaml:/root/erpc.yaml // [!code focus]
+      ports: // [!code focus]
+        - 4000:4000 // [!code focus]
+        - 4001:4001 // [!code focus]
+      restart: always // [!code focus]
+```
+
+3. Set erpc url in [rindexer network config](https://rindexer.xyz/docs/start-building/yaml-config/networks#rpc):
+
+```yaml [rindexer.yaml]
+name: rETHIndexer
+description: My first rindexer project
+repository: https://github.com/joshstevens19/rindexer
+project_type: no-code
+networks:
+- name: ethereum
+  chain_id: 1
+  rpc: http://erpc:4000/main/evm/1 // [!code focus]
+```
+
+and you are set to go. the rpc requests now will be redirected toward erpc and it will handle caching, failover, auto-batching, rate-limiting, auto-discovery of node providers, etc. behind the scens.

documentation/docs/pages/docs/start-building/yaml-config/networks.mdx

@@ -51,6 +51,19 @@ networks:
   rpc: https://mainnet.gateway.tenderly.co // [!code focus]
 ```
 
+You can use [erpc](https://rindexer.xyz/docs/references/rpc-node-providers#rpc-proxy-and-caching) for load-balancing between multiple rpc endpoints (with failover, re-org aware caching, auto-batching, rate-limiters, auto-discovery of node providers, etc.)
+
+```yaml [rindexer.yaml]
+name: rETHIndexer
+description: My first rindexer project
+repository: https://github.com/joshstevens19/rindexer
+project_type: no-code
+networks:
+- name: ethereum
+  chain_id: 1
+  rpc: http://erpc:4000/main/evm/1 // [!code focus]
+```
+
 We advise using environment variables for the rpc url to avoid checking in sensitive information.
 
 ```yaml [rindexer.yaml]