diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..affaad3
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,2 @@
+*
+!target/*-fat.jar
diff --git a/.github/workflows/build-deploy.yml b/.github/workflows/build-deploy.yml
index 0d8f5ec..c69be22 100644
--- a/.github/workflows/build-deploy.yml
+++ b/.github/workflows/build-deploy.yml
@@ -57,7 +57,7 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
 
       # extra tags for release branch
-      - name: Build and push Docker image
+      - name: Build and push Docker image for release
         if: ${{ contains(github.ref, 'release') }}
         uses: docker/build-push-action@v6
         with:
diff --git a/README.md b/README.md
index fcf56c3..731db6a 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ Bare bones web service for entering an OAI-PMH URL, verifying that the URL retri
 The service presents as a HTML form that responds to manual user input
 
 ## Prerequisites
-- Java 8 JDK
+- Java 21 JDK
 - Maven 3.6.0
 
 ## Building
diff --git a/entrypoint.sh b/entrypoint.sh
deleted file mode 100755
index 84f2a87..0000000
--- a/entrypoint.sh
+++ /dev/null
@@ -1,2 +0,0 @@
-#!/bin/sh
-exec /usr/bin/java $JAVA_OPTIONS -jar /oai-viewer.jar