Update Node.js version in GitHub Actions workflow

Author: drizzentic

.github/workflows/master.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x]
+        node-version: [18.x]
 
     steps:
       - uses: actions/checkout@v3
@@ -39,4 +39,4 @@ jobs:
           file: ./Dockerfile
           platforms: linux/amd64,linux/arm64
           push: true
-          tags: jembi/openhim-console:latest
+          tags: jembi/openhim-console:latest