Added Github workflow for generating docs (flyteorg#85)

.github/workflows/generate-docs.yaml

@@ -0,0 +1,54 @@
+name: Generate Documentation
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    name: Generate documentation
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          lfs: true
+      - uses: actions/setup-go@v1
+        with:
+          go-version: '1.16'
+      - uses: actions/setup-python@v1
+        with:
+          python-version: 3.9
+      - uses: actions/cache@v2
+        with:
+          path: ~/.cache/pip
+          key: docs-pip-${{ runner.os }}-${{ hashFiles('doc-requirements.txt') }}-${{ hashFiles('doc-requirements.in') }}
+          restore-keys: docs-pip-
+      - name: Install Dependencies
+        run: |
+          # Install all requirments
+          pip install -r doc-requirements.txt
+      - name: Generate documentation
+        run: |
+          make -C docs gendocs
+      - name: Create Pull Request
+        id: cpr
+        uses: peter-evans/create-pull-request@v3
+        with:
+          token: ${{ secrets.FLYTE_BOT_PAT }}
+          commit-message: Update documentation
+          committer: Flyte-Bot <[email protected]>
+          author: ${{ github.actor }} <${{ github.actor }}@users.noreply.github.com>
+          signoff: true
+          branch: flyte-bot-update-documentation
+          delete-branch: true
+          title: 'Update documentation'
+          body: |
+            Update documentation
+            - Auto-generated by [flyte-bot]
+          labels: |
+            documentation
+          team-reviewers: |
+            owners
+            maintainers
+          draft: false