use node version from nvmrc in build

Author: vdvibhu20

.github/workflows/main.yml

@@ -22,6 +22,13 @@ jobs:
         key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
         restore-keys: |
           ${{ runner.os }}-yarn-
+    - name: Read .nvmrc
+      run: echo "##[set-output name=NVMRC;]$(cat .nvmrc)"
+      id: nvm
+    - name: Use Node.js (.nvmrc)
+      uses: actions/setup-node@v1
+      with:
+        node-version: "${{ steps.nvm.outputs.NVMRC }}"
     - name: Install Dependencies
       run: yarn install
     - name: Build