Move the documentation repository to a public repo

Added a LICENSE and documentation on how to contribute

Updated CI/CD to use the root level code

.github/workflows/build_n_push.yml

@@ -0,0 +1,34 @@
+name: docs site build and push
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "**"
+
+jobs:
+  docs_build_n_push:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: netbirdio/docs.netbird.io
+      -
+        name: Login to DockerHub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v1
+        with:
+          username: netbirdio
+          password: ${{ secrets.DOCKER_TOKEN }}
+      -
+        name: Docker build and push
+        uses: docker/build-push-action@v2
+        with:
+          file: docker/Dockerfile
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}