[ECO-2116] Add a branch protection rule to only allow merging to `pro…

…duction` from `main` (#209)

Co-authored-by: matt <[email protected]>

.github/workflows/production-branch-protection.yaml

@@ -0,0 +1,24 @@
+# yamllint disable rule:empty-lines rule:key-ordering
+---
+name: 'Production Branch Protection'
+
+"on":
+  pull_request:
+    types:
+    - 'opened'
+    - 'reopened'
+    - 'synchronize'
+    - 'edited'
+
+jobs:
+  production-branch-protection:
+    runs-on: 'ubuntu-latest'
+    steps:
+    - name: 'Check if the PR is targeting the production branch'
+      id: 'check_branch'
+      if: |
+        github.base_ref == 'production' && github.head_ref != 'main'
+      run: |
+        echo ERROR: You can only merge to the production branch from main.
+        exit 1
+...

src/rust/example.env

@@ -19,7 +19,8 @@ EMOJICOIN_MODULE_ADDRESS="0x11113ddc70ea051ffd8a7cde7b96818326aabf56fdfd47807f77
 # For mainnet: https://grpc.mainnet.aptoslabs.com:443
 # For testnet: https://grpc.testnet.aptoslabs.com:443
 # For devnet: https://grpc.devnet.aptoslabs.com:443
-# For a local end-to-end testing chain: http://streamer:50051
+# For a local end-to-end testing chain: http://host.docker.internal:50051,
+#   or http://localhost:50051 if that doesn't work.
 GRPC_DATA_SERVICE_URL="https://grpc.testnet.aptoslabs.com:443"
 
 # For a public chain you have to get this token from https://developers.aptoslabs.com/.