Immutable zkEVM Shanghai upgrade steps (#802)

* shanghai upgrade steps

* rm json arg

---------

Co-authored-by: Milap Sheth <milap@axelar.network>

src/pages/validator/external-chains/immutable.mdx

@@ -112,9 +112,9 @@ mkdir /opt/immutable-zkevm
 2. Pull the Docker image.
 
 ```bash
-docker pull ghcr.io/immutable/go-ethereum/go-ethereum:v0.0.8
+docker pull ghcr.io/immutable/go-ethereum/go-ethereum:v1.0.0-beta.1
 # Create a short-form tag we can reference in the next few commands
-docker tag ghcr.io/immutable/go-ethereum/go-ethereum:v0.0.8 geth
+docker tag ghcr.io/immutable/go-ethereum/go-ethereum:v1.0.0-beta.1 geth
 ```
 
 3. Initialise the node.
@@ -126,8 +126,9 @@ docker run \
   --rm \
   -v /opt/immutable-zkevm:/mnt/geth \
   --name geth \
-  geth init \
-  --datadir /mnt/geth /etc/geth/testnet.json 
+  geth immutable bootstrap rpc \
+  --zkevm testnet \
+  --datadir /mnt/geth
 ```
 </tab-item>
 <tab-item title="Mainnet">
@@ -136,8 +137,9 @@ docker run \
   --rm \
   -v /opt/immutable-zkevm:/mnt/geth \
   --name geth \
-  geth init \
-  --datadir /mnt/geth /etc/geth/mainnet.json 
+  geth immutable bootstrap rpc \
+  --zkevm mainnet \
+  --datadir /mnt/geth
 ```
 </tab-item>
 </tabs>
@@ -154,9 +156,9 @@ docker run \
   --name geth \
   -p 8545:8545 \
   geth \
+  --zkevm testnet \
   --config /etc/geth/testnet.toml \
   --datadir /mnt/geth \
-  --networkid 13473 \
   --http \
   --http.port "8545" \
   --http.addr "0.0.0.0"
@@ -171,9 +173,9 @@ docker run \
   --name geth \
   -p 8545:8545 \
   geth \
+  --zkevm mainnet \
   --config /etc/geth/mainnet.toml \
   --datadir /mnt/geth \
-  --networkid 13371 \
   --http \
   --http.port "8545" \
   --http.addr "0.0.0.0"