add start doc

Author: thinkAfCod

RUN_NODE_ON_SEPOLIA.md

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+# Run node on Sepolia
+
+1. Run a op-besu
+
+pull docker image:
+
+```shell
+docker pull ghcr.io/optimism-java/op-besu:latest
+```
+
+create a directory that will be used later:
+
+```shell
+mkdir data_sepolia
+```
+
+generate a jwt key, it will also be used by hildr:
+
+```shell
+openssl rand -hex 32 > jwt.txt
+```
+
+run a op-besu by docker:
+
+```shell
+docker run -d -it --name op-besu -p 8545:8545 -p 8551:8551 -v ./jwt.txt:/jwt/jwtsecret \
+-v ./data_sepolia:/data/ \
+ghcr.io/optimism-java/op-besu:latest \
+--network=OP_SEPOLIA \
+--p2p-enabled=false \
+--sync-mode=FULL \
+--discovery-enabled=false \
+--data-path="/data/" \
+--engine-rpc-enabled \
+--engine-jwt-secret="/jwt/jwtsecret" \
+--rpc-http-enabled \
+--host-allowlist="*" \
+--engine-host-allowlist="*" \
+--logging=INFO \
+--version-compatibility-protection=false
+```
+
+Sometimes docker could be running under the root user, it may throw some exception logs like below:
+
+```shell
+java.io.FileNotFoundException: /data/VERSION_METADATA.json (Permission denied)
+        at java.base/java.io.FileOutputStream.open0(Native Method)
+        at java.base/java.io.FileOutputStream.open(FileOutputStream.java:289)
+        at java.base/java.io.FileOutputStream.<init>(FileOutputStream.java:230)
+        at java.base/java.io.FileOutputStream.<init>(FileOutputStream.java:179)
+        at com.fasterxml.jackson.core.TokenStreamFactory._fileOutputStream(TokenStreamFactory.java:334)
+        at com.fasterxml.jackson.core.JsonFactory.createGenerator(JsonFactory.java:1547)
+        at com.fasterxml.jackson.databind.ObjectMapper.createGenerator(ObjectMapper.java:1257)
+        at com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:3980)
+        at org.hyperledger.besu.ethereum.core.VersionMetadata.writeToDirectory(VersionMetadata.java:71)
+        at org.hyperledger.besu.ethereum.core.VersionMetadata.versionCompatibilityChecks(VersionMetadata.java:119)
+        at org.hyperledger.besu.cli.BesuCommand.run(BesuCommand.java:1114)
+        at picocli.CommandLine.executeUserObject(CommandLine.java:2026)
+        at picocli.CommandLine.access$1500(CommandLine.java:148)
+        at picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2461)
+        at picocli.CommandLine$RunLast.handle(CommandLine.java:2453)
+        at picocli.CommandLine$RunLast.handle(CommandLine.java:2415)
+        at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2273)
+        at picocli.CommandLine$RunLast.execute(CommandLine.java:2417)
+        at picocli.CommandLine.execute(CommandLine.java:2170)
+        at org.hyperledger.besu.cli.BesuCommand.lambda$createExecuteTask$1(BesuCommand.java:1041)
+        at picocli.CommandLine.execute(CommandLine.java:2170)
+        at org.hyperledger.besu.cli.BesuCommand.lambda$createPluginRegistrationTask$2(BesuCommand.java:1051)
+        at picocli.CommandLine.execute(CommandLine.java:2170)
+        at org.hyperledger.besu.cli.util.ConfigDefaultValueProviderStrategy.execute(ConfigDefaultValueProviderStrategy.java:58)
+        at picocli.CommandLine.execute(CommandLine.java:2170)
+        at org.hyperledger.besu.cli.BesuCommand.executeCommandLine(BesuCommand.java:1078)
+        at org.hyperledger.besu.cli.BesuCommand.parse(BesuCommand.java:1020)
+        at org.hyperledger.besu.Besu.main(Besu.java:41)
+/data/VERSION_METADATA.json (Permission denied)
+```
+
+Just need to modify the access permissions of `data_sepolia` to fix it:
+
+```shell
+sudo chmod 777 data_sepolia -R
+```
+
+2. Run a hildr
+
+pull docker image:
+
+```shell
+docker pull ghcr.io/optimism-java/hildr:latest
+```
+
+get IP of the op-besu container, and hildr container will use it to connect to op-besu via the docker bridge:
+
+```bash
+docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' op-besu
+```
+
+run a hildr node:
+
+```bash
+docker run -d -it --name hildr -p 11545:11545 \
+-v ./jwt.txt:/jwt/jwt.txt \
+ghcr.io/optimism-java/hildr:latest \
+--network optimism-sepolia \
+--jwt-file /jwt/jwt.txt \
+--l1-rpc-url <l1_sepolia_rpc_url> \
+--l1-ws-rpc-url <l1_sepolia_ws_rpc_url> \
+--l1-beacon-url <l1_beacon_chain_sepolia_rpc_url> \
+--l2-rpc-url <op_besu_rpc> \
+--l2-engine-url <op_besu_engine_rpc> \
+--rpc-port 11545 \
+--log-level INFO \
+--sync-mode full
+```
+
+The synchronization needs to handle empty messages at the beginning, and the actual block synchronization will take place about 10 minutes later.
+
+Use curl get block data from op-besu:
+
+```bash
+curl --request POST 'https://localhost:8545' \
+--header 'Content-Type: application/json' \
+--data-raw '{"id":2, "jsonrpc":"2.0", "method": "eth_getBlockByNumber", "params":["0xe", true]}'
+```
+
+You can confirm whether the block and transaction information is correct through the Sepolia network's blockchain explorer.