ci: add docker building on merge to main or workflow changes (#78)

Author: tjdevries

.github/workflows/scip-docker.yml

@@ -0,0 +1,47 @@
+name: docker-scip
+
+on:
+  push:
+    branches:
+      - scip
+  pull_request:
+    paths:
+      - '.github/workflows/**'
+      - 'Dockerfile.autoindex'
+
+jobs:
+  release-image:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install asdf.
+        uses: asdf-vm/actions/setup@v2.1.0
+      - name: Cache asdf and asdf-managed tools.
+        uses: actions/cache@v3.3.1
+        id: asdf-cache
+        with:
+          path: ${{ env.ASDF_DIR }}
+          key: asdf-${{ runner.os}}-${{ hashFiles('**/.tool-versions') }}
+      - name: Install asdf tools (if not cached).
+        if: steps.asdf-cache.outputs.cache-hit != 'true'
+        uses: asdf-vm/actions/install@v2.1.0
+      - name: Get npm cache directory
+        id: npm-cache
+        run: echo "dir=$(npm config get cache)" >> $GITHUB_OUTPUT
+      - uses: actions/cache@v2
+        with:
+          path: ${{ steps.npm-cache.outputs.dir }}
+          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+      - run: npm install
+      - run: cd ./packages/pyright-scip/ && npm install && npm run build
+      - uses: docker/setup-buildx-action@v1
+      - name: Build Dockerfile
+        id: docker_build_autoindex
+        uses: docker/build-push-action@v2
+        with:
+          file: Dockerfile.autoindex
+          push: false
+          tags: |
+            sourcegraph/scip-python:test