Add env variable to enable/disable sending txs to L2 from watcher peer (#293)

* Add flag to enable/disable watcher peer L2 txs

* Update watcher-ts version in readme

Former-commit-id: d3715d19520be01a3a5e98ce6ce9874f72cc568a

app/data/stacks/mobymask-v2/README.md

@@ -21,7 +21,7 @@ Checkout to the required versions and branches in repos
 ```bash
 # watcher-ts
 cd ~/cerc/watcher-ts
-git checkout v0.2.34
+git checkout v0.2.35
 
 # react-peer
 cd ~/cerc/react-peer

app/data/stacks/mobymask-v2/mobymask-only.md

@@ -17,7 +17,7 @@ Checkout to the required versions and branches in repos:
 ```bash
 # watcher-ts
 cd ~/cerc/watcher-ts
-git checkout v0.2.34
+git checkout v0.2.35
 
 # MobyMask
 cd ~/cerc/MobyMask
@@ -38,8 +38,9 @@ This should create the required docker images in the local image registry
 
 * In [mobymask-params.env](../../config/watcher-mobymask-v2/mobymask-params.env) file set `DEPLOYED_CONTRACT` to existing deployed mobymask contract address
   * Setting `DEPLOYED_CONTRACT` will skip contract deployment when running stack
+  * `ENABLE_PEER_L2_TXS` is used to enable/disable sending txs to L2 chain from watcher peer.
 * Update the [optimism-params.env](../../config/watcher-mobymask-v2/optimism-params.env) file with Optimism endpoints and other params for the Optimism running separately
-  * If `PRIVATE_KEY_PEER` is not set the inline watcher peer will not send txs to L2 on receiving P2P network messages
+  * `PRIVATE_KEY_PEER` is used by watcher peer to send txs to L2 chain
 * NOTE:
   * Stack Orchestrator needs to be run in [`dev`](/docs/CONTRIBUTING.md#install-developer-mode) mode to be able to edit the env file
   * If Optimism is running on the host machine, use `host.docker.internal` as the hostname to access the host port