Test postProcessingCommand adding a warning block

We want to add a note to each generated API doc for Random Beacon that informs
about contracts not being deployed on Mainnet. This commit tests the command for
adding the note.

.github/workflows/contracts-random-beacon-docs.yml

@@ -59,20 +59,24 @@ jobs:
   contracts-docs-publish:
     name: Publish contracts documentation
     needs: docs-detect-changes
-    if: github.event_name == 'release' && startsWith(github.ref, 'refs/tags/solidity/')
-    uses: keep-network/ci/.github/workflows/reusable-solidity-docs.yml@main
+    #TODO: remove alternative before merge
+    if: (github.event_name == 'release' && startsWith(github.ref, 'refs/tags/solidity/')) || github.event_name == 'pull_request'
+    # TODO: switch `post-processing-command` to `main` before merge
+    uses: keep-network/ci/.github/workflows/reusable-solidity-docs.yml@post-processing-command
     with:
       projectDir: /solidity/random-beacon
-      publish: true
-      addTOC: false
-      verifyCommits: true
-      destinationRepo: threshold-network/threshold
-      destinationFolder: ./docs/app-development/random-beacon/random-beacon-api
-      destinationBaseBranch: main
-      userEmail: [email protected]
-      userName: Valkyrie
-      rsyncDelete: true
-    secrets:
-      githubToken: ${{ secrets.THRESHOLD_DOCS_GITHUB_TOKEN }}
-      gpgPrivateKey: ${{ secrets.THRESHOLD_DOCS_GPG_PRIVATE_KEY_BASE64 }}
-      gpgPassphrase: ${{ secrets.THRESHOLD_DOCS_GPG_PASSPHRASE }}
+      postProcessingCommand: find ./generated-docs -name "*.md" -type f -exec sed -i '3i \n> **Warning:** This file documents a code which is not yet deployed to Mainnet.\n' {} +
+    # TODO: uncomment before merge
+    #   publish: true
+    #   addTOC: false
+    #   verifyCommits: true
+    #   destinationRepo: threshold-network/threshold
+    #   destinationFolder: ./docs/app-development/random-beacon/random-beacon-api
+    #   destinationBaseBranch: main
+    #   userEmail: [email protected]
+    #   userName: Valkyrie
+    #   rsyncDelete: true
+    # secrets:
+    #   githubToken: ${{ secrets.THRESHOLD_DOCS_GITHUB_TOKEN }}
+    #   gpgPrivateKey: ${{ secrets.THRESHOLD_DOCS_GPG_PRIVATE_KEY_BASE64 }}
+    #   gpgPassphrase: ${{ secrets.THRESHOLD_DOCS_GPG_PASSPHRASE }}