diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2c68432
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,37 @@
+# Environment variables and sensitive configuration files
+.env
+.env.*
+.env.local
+.env.development
+.env.test
+.env.production
+.env.staging
+
+# Private keys and credentials
+*.key
+*.pem
+private-key*
+*private-key*
+
+# Infura and blockchain configuration
+infura.config*
+*.secrets
+
+# Node modules and dependencies
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Build artifacts
+dist/
+build/
+*.log
+
+# IDE and editor files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
diff --git a/actions/setup-node-from-nvmrc/README.md b/actions/setup-node-from-nvmrc/README.md
new file mode 100644
index 0000000..90d529c
--- /dev/null
+++ b/actions/setup-node-from-nvmrc/README.md
@@ -0,0 +1,28 @@
+# Setup Node.js from .nvmrc
+
+A reusable composite action that sets up Node.js using the version specified in an `.nvmrc` file.
+
+## Usage
+
+```yaml
+steps:
+  - uses: actions/checkout@v2
+  - name: Setup Node.js from .nvmrc
+    uses: ./actions/setup-node-from-nvmrc
+```
+
+## Requirements
+
+- The repository must have an `.nvmrc` file in the root directory
+- The `.nvmrc` file should contain a valid Node.js version (e.g., `16.14.0`, `18.x`)
+
+## What it does
+
+1. Reads the Node.js version from the `.nvmrc` file
+2. Sets up Node.js with the specified version using `actions/setup-node@v2`
+
+## Benefits
+
+- Centralizes Node.js version management in `.nvmrc`
+- Eliminates duplicated setup code across workflows
+- Uses modern GitHub Actions output syntax (`$GITHUB_OUTPUT`)
diff --git a/actions/setup-node-from-nvmrc/action.yml b/actions/setup-node-from-nvmrc/action.yml
new file mode 100644
index 0000000..610cf01
--- /dev/null
+++ b/actions/setup-node-from-nvmrc/action.yml
@@ -0,0 +1,13 @@
+name: 'Setup Node.js from .nvmrc'
+description: 'Sets up Node.js using the version specified in .nvmrc file'
+runs:
+  using: "composite"
+  steps:
+    - name: Get Node.js version
+      id: nvm
+      shell: bash
+      run: echo "NODE_VERSION=$(cat .nvmrc)" >> $GITHUB_OUTPUT
+    - name: Setup Node.js
+      uses: actions/setup-node@v2
+      with:
+        node-version: ${{ steps.nvm.outputs.NODE_VERSION }}
diff --git a/blockchain-address.json b/blockchain-address.json
new file mode 100644
index 0000000..da3c68b
--- /dev/null
+++ b/blockchain-address.json
@@ -0,0 +1,17 @@
+{
+  "address": "1wiz18xYmhRX6xStj2b9t1rwWX4GKUgpv",
+  "chain_stats": {
+    "funded_txo_count": 11,
+    "funded_txo_sum": 15007688098,
+    "spent_txo_count": 5,
+    "spent_txo_sum": 15007599040,
+    "tx_count": 13
+  },
+  "mempool_stats": {
+    "funded_txo_count": 0,
+    "funded_txo_sum": 0,
+    "spent_txo_count": 0,
+    "spent_txo_sum": 0,
+    "tx_count": 0
+  }
+}
diff --git a/workflow-templates/build-lint-test.yml b/workflow-templates/build-lint-test.yml
index b4d113e..f25a7de 100644
--- a/workflow-templates/build-lint-test.yml
+++ b/workflow-templates/build-lint-test.yml
@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
       - run: yarn --frozen-lockfile --ignore-scripts
diff --git a/workflow-templates/create-release-pr.yml b/workflow-templates/create-release-pr.yml
index c34ce9a..99bf1ad 100644
--- a/workflow-templates/create-release-pr.yml
+++ b/workflow-templates/create-release-pr.yml
@@ -29,12 +29,8 @@ jobs:
           # We check out the specified branch, which will be used as the base
           # branch for all git operations and the release PR.
           ref: ${{ github.event.inputs.base-branch }}
-      - name: Get Node.js version
-        id: nvm
-        run: echo ::set-output name=NODE_VERSION::$(cat .nvmrc)
-      - uses: actions/setup-node@v2
-        with:
-          node-version: ${{ steps.nvm.outputs.NODE_VERSION }}
+      - name: Setup Node.js from .nvmrc
+        uses: ./actions/setup-node-from-nvmrc
       - uses: MetaMask/action-create-release-pr@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/workflow-templates/publish-release.yml b/workflow-templates/publish-release.yml
index 06c5f43..8d300bb 100644
--- a/workflow-templates/publish-release.yml
+++ b/workflow-templates/publish-release.yml
@@ -14,12 +14,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Get Node.js version
-        id: nvm
-        run: echo ::set-output name=NODE_VERSION::$(cat .nvmrc)
-      - uses: actions/setup-node@v2
-        with:
-          node-version: ${{ steps.nvm.outputs.NODE_VERSION }}
+      - name: Setup Node.js from .nvmrc
+        uses: ./actions/setup-node-from-nvmrc
       - uses: MetaMask/action-publish-release@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}