Update main.yml

Update: gha workflow with npm publish step

Author: csernokn123

.github/workflows/main.yml

@@ -19,4 +19,17 @@ jobs:
             -w "/app" \
             -v $PWD:/app \
             node:8 bash -c "npm i --no-save -q; npm run build; npm run coverage -- --reporter mocha-junit-reporter; chown -R $(id -u):$(id -g) ."
-
+      - name: Setup .npmrc
+        run: echo "//registry.npmjs.org/:_authToken=${NPM_TOKEN}" > .npmrc
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+      - name: Build, Version, and Publish to npm using Docker
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+          NPM_VERSION: '1.0.0' 
+        run: |
+          docker run --rm \
+            -w "/app" \
+            -v $PWD:/app \
+            -v ${{ github.workspace }}/.npmrc:/root/.npmrc \ 
+            node:16 bash -c "npm i --no-save -q; npm run build; npm version ${NPM_VERSION} > version.txt; npm publish --tag dev; chown -R $(id -u):$(id -g) ."