Merge pull request mysql#5 from planetscale/docs-and-build-fixes

Docs and build fixes

Author: Sam Kottler

.buildkite/pipeline.yml

@@ -21,9 +21,10 @@ steps:
 
   - wait
 
-  - name: "Build runtime mysql-server container"
-    label: ":docker: Build runtime container"
+  - name: "Build runtime mysql-server container for branch"
+    label: ":docker: Build runtime branch container"
     command: "/usr/bin/mysqld -V"
+    branches: "!${MAIN_BRANCH}"
     plugins:
       - ecr#v2.3.0:
           login: true
@@ -33,3 +34,17 @@ steps:
           run: release
           push:
             - "release:${REGISTRY}/branch/${IMAGE_NAME}:${BUILDKITE_BRANCH}-latest"
+
+  - name: "Build runtime mysql-server container for main"
+    label: ":docker: Build runtime main container"
+    command: "/usr/bin/mysqld -V"
+    branches: "${MAIN_BRANCH}"
+    plugins:
+      - ecr#v2.3.0:
+          login: true
+      - artifacts#v1.5.0:
+          download: "dist/mysql-*.tar.gz"
+      - docker-compose#v3.9.0:
+          run: release
+          push:
+            - "release:${REGISTRY}/main/${IMAGE_NAME}:${BUILDKITE_BRANCH}-latest"

_planetscale/docs/registry.md

@@ -0,0 +1,12 @@
+# Container registry for mysql-server
+
+
+## Using ECR
+
+### List images
+
+To retrieve details of an image built against a branch:
+
+```
+aws ecr describe-images --profile build-ops --repository-name 'branch/mysql-server' --image-ids imageTag=8.0-latest | jq -r '.imageDetails[]'
+```