[CI] Added workflow for publishing the Solr image (#303)

[CI] Added Dockerfile for Solr image

Author: mnocon

.github/workflows/solr.yaml

@@ -0,0 +1,26 @@
+name: Build and publish Solr Docker image
+on:
+    workflow_dispatch: ~
+
+env:
+  IMAGE_NAME: ghcr.io/ibexa/core/solr
+
+jobs:
+    build-and-publish:
+        runs-on: ubuntu-latest
+        permissions:
+          packages: write
+        steps:
+            - uses: actions/checkout@v3
+            - name: Log in to the Container registry
+              uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+              with:
+                registry: ghcr.io
+                username: ${{ github.actor }}
+                password: ${{ secrets.GITHUB_TOKEN }}
+            - name: Build image
+              run: docker build -t "$IMAGE_NAME:latest" docker/solr
+            - name: Push image
+              if: github.event_name == 'workflow_dispatch'
+              run: docker push "$IMAGE_NAME"
+

docker/solr/Dockerfile

@@ -0,0 +1,14 @@
+FROM alpine:3.18.5 as builder
+RUN apk add --no-cache --upgrade bash git curl
+RUN adduser --disabled-password user
+USER user
+WORKDIR /home/user
+RUN git clone --depth=1 https://github.com/ibexa/solr.git solr
+RUN ./solr/bin/generate-solr-config.sh --destination-dir=config --solr-version=8.6.3
+
+FROM solr:8.6.3
+USER root
+RUN rm -rf server/solr/configsets/_default/conf/*
+USER solr
+COPY --from=builder /home/user/config server/solr/configsets/_default/conf
+CMD ["solr-precreate", "collection1"]