Add instructions to rebuild laconicd enabling slashing module

ops/stage0-to-stage1.md

@@ -51,6 +51,10 @@ Once all the participants have completed their onboarding, stage0 laconicd chain
   # Validator allocation:   2000000000000000 (10^15)
   ./scripts/generate-stage1-genesis-using-allocations.sh $DEPLOYMENTS_DIR/stage0-deployment 1000000000000 2000000000000000
 
+  # If you see the error "Error: genesis.json file already exists: /root/.laconicd/config/genesis.json",
+  # remove the temporary data directory and try again
+  sudo rm -rf stage1-genesis
+
   # Expected output:
   # Genesis file for stage1 written to output/genesis.json
 
@@ -69,6 +73,24 @@ Once all the participants have completed their onboarding, stage0 laconicd chain
   cp ~/cerc/fixturenet-laconicd-stack/stack-orchestrator/stacks/fixturenet-laconicd/output/genesis.json stage1-deployment/data/genesis-config/genesis.json
   ```
 
+* Rebuild laconicd container with latest code to enable `slashing` module:
+
+  ```bash
+  # laconicd source
+  cd ~/cerc/laconicd
+
+  # Pull latest changes
+  git pull
+
+  # Confirm the latest commit hash
+  git log
+
+  # Rebuild the containers
+  cd /srv/laconicd
+
+  laconic-so --stack ~/cerc/fixturenet-laconicd-stack/stack-orchestrator/stacks/fixturenet-laconicd build-containers --force-rebuild
+  ```
+
 * Start the stage1 deployment:
 
   ```bash