feat: add Docker image (#740)

* feat: add Docker distribution

* fix: change output directory name

* feat: add image labels

* chore: debug ci

* fix: ci syntax

* fix: enable release ci

* chore: ci job wording

* fix: dockerfile name

* feat: add symlink for instrument.js

.github/workflows/publish-docker-image.yml

@@ -0,0 +1,42 @@
+name: Publish splunk-otel-js Docker image to ghcr.io
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  publish-image:
+    runs-on: ubuntu-20.04
+    permissions:
+      packages: write
+      contents: read
+    steps:
+      - uses: actions/[email protected]
+
+      - uses: docker/setup-buildx-action@v2
+
+      - name: Put GITHUB_REF_NAME into env
+        run: echo GITHUB_REF_NAME=${GITHUB_REF_NAME} >> $GITHUB_ENV
+
+      - name: Set the major version number
+        run: echo MAJOR_VERSION=${GITHUB_REF_NAME} | sed -e 's/\..*//' >> $GITHUB_ENV
+
+      - name: Login to GitHub Container Registry
+        uses: docker/[email protected]
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: build and publish container
+        uses: docker/[email protected]
+        with:
+          push: true
+          file: Dockerfile
+          build-args: |
+            RELEASE_VER=${{ env.GITHUB_REF_NAME }}
+          tags: |
+            ghcr.io/signalfx/splunk-otel-js/splunk-otel-js:latest
+            ghcr.io/signalfx/splunk-otel-js/splunk-otel-js:${{ env.MAJOR_VERSION }}
+            ghcr.io/signalfx/splunk-otel-js/splunk-otel-js:${{ env.GITHUB_REF_NAME }}
+

Dockerfile

@@ -0,0 +1,18 @@
+FROM node:16 AS build
+
+WORKDIR /splunk-otel-js
+COPY . .
+RUN npm install
+RUN npm run compile
+RUN npm run prebuild:os '14.0.0' '15.0.0' '16.0.0' '17.0.1' '18.0.0'
+RUN npm pack && tar xf splunk-otel-$(npm view @splunk/otel version).tgz
+RUN npm prune --omit=dev && cp -r node_modules/ package
+
+FROM busybox
+
+LABEL org.opencontainers.image.source="https://github.com/signalfx/splunk-otel-js"
+LABEL org.opencontainers.image.description="Splunk Distribution of OpenTelemetry Node.js Instrumentation"
+
+COPY --from=build /splunk-otel-js/package /autoinstrumentation
+RUN chmod -R go+r /autoinstrumentation
+RUN cd /autoinstrumentation && ln -s ./instrument.js /autoinstrumentation/autoinstrumentation.js