fix: add image to docker-compose.solr.yaml to use DDEV offline (#67)

Author: stasadev

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,15 +1,19 @@
 ## The Issue
 
-- #<issue number>
+- Fixes #REPLACE_ME_WITH_RELATED_ISSUE_NUMBER
 
 <!-- Provide a brief description of the issue. -->
 
 ## How This PR Solves The Issue
 
+<!-- Describe the key change(s) in this PR that address the issue above. -->
+
 ## Manual Testing Instructions
 
+<!-- If this PR changes logic, consider adding additional steps or context to the instructions below. -->
+
 ```bash
-ddev add-on get https://github.com/<user>/<repo>/tarball/<branch>
+ddev add-on get https://github.com/ddev/ddev-solr/tarball/refs/pull/REPLACE_ME_WITH_THIS_PR_NUMBER/head
 ddev restart
 ```
 

docker-compose.solr.yaml

@@ -1,6 +1,7 @@
 #ddev-generated
 services:
   solr:
+    image: ${SOLR_BASE_IMAGE:-solr:9.6}-${DDEV_SITENAME}-built
     build:
       dockerfile_inline: |
         ARG SOLR_BASE_IMAGE="scratch"