From 70868eba2cf7b61641c8143f3fb9d3c2e8b6f56e Mon Sep 17 00:00:00 2001
From: Gabriel Cunha <cunha.gabriel919@gmail.com>
Date: Sat, 16 May 2026 16:23:35 -0300
Subject: [PATCH 1/2] using jlink and jdeps to build docker image

---
 ojp-server/README.md       | 21 +++++++++++++++++++--
 ojp-server/base.Dockerfile | 14 ++++++++++++++
 ojp-server/pom.xml         |  2 +-
 3 files changed, 34 insertions(+), 3 deletions(-)
 create mode 100644 ojp-server/base.Dockerfile

diff --git a/ojp-server/README.md b/ojp-server/README.md
index b4d370f61..7fdd3b716 100644
--- a/ojp-server/README.md
+++ b/ojp-server/README.md
@@ -1,8 +1,25 @@
 ## Docker Image
 
-### Build docker image locally
+The base image is a custom Alpine JRE built with `jlink` (only the modules required by OJP), bringing the final image size to **68MB**.
 
-> mvn compile jib:dockerBuild
+### Build the base image (first time or when dependencies change)
+
+```bash
+# From the repository root
+docker build -f ojp-server/base.Dockerfile -t rrobetti/ojp-base:jre24-alpine .
+```
+
+### Build the app image locally
+
+```bash
+mvn -pl ojp-server/ jib:dockerBuild -Djib.from.image=docker://rrobetti/ojp-base:jre24-alpine
+```
+
+### Run locally
+
+```bash
+docker run -p 1059:1059 rrobetti/ojp:0.4.9-SNAPSHOT
+```
 
 ### Build and push to Docker Hub
 PS: Only authorized users.
diff --git a/ojp-server/base.Dockerfile b/ojp-server/base.Dockerfile
new file mode 100644
index 000000000..3ae647018
--- /dev/null
+++ b/ojp-server/base.Dockerfile
@@ -0,0 +1,14 @@
+FROM eclipse-temurin:24-jdk-alpine AS jre-build
+
+RUN jlink \
+    --add-modules java.base,java.compiler,java.desktop,java.management,java.naming,java.rmi,java.scripting,java.security.jgss,java.sql,jdk.httpserver,jdk.unsupported \
+    --strip-debug \
+    --no-man-pages \
+    --no-header-files \
+    --compress=zip-6 \
+    --output /custom-jre
+
+FROM alpine:3.21
+ENV JAVA_HOME=/opt/java
+ENV PATH="${JAVA_HOME}/bin:${PATH}"
+COPY --from=jre-build /custom-jre $JAVA_HOME
diff --git a/ojp-server/pom.xml b/ojp-server/pom.xml
index af0b24cdc..b37d3b002 100644
--- a/ojp-server/pom.xml
+++ b/ojp-server/pom.xml
@@ -308,7 +308,7 @@
                 <version>${jib.plugin.version}</version>
                 <configuration>
                     <from>
-                        <image>eclipse-temurin:22-jre</image>
+                        <image>rrobetti/ojp-base:jre24-alpine</image>
                     </from>
                     <to>
                         <image>rrobetti/ojp:${project.version}</image>

From 1e54774e25bc156187142c1ae92a98fe6ff628f6 Mon Sep 17 00:00:00 2001
From: Gabriel Cunha <cunha.gabriel919@gmail.com>
Date: Sat, 16 May 2026 22:51:21 -0300
Subject: [PATCH 2/2] changing the image size, considering the image that runs
 the app

---
 ojp-server/README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ojp-server/README.md b/ojp-server/README.md
index 0c3258d97..c36756a30 100644
--- a/ojp-server/README.md
+++ b/ojp-server/README.md
@@ -1,6 +1,6 @@
 ## Docker Image
 
-The base image is a custom Alpine JRE built with `jlink` (only the modules required by OJP), bringing the final image size to **68MB**.
+The base image is a custom Alpine JRE built with `jlink` (only the modules required by OJP), bringing the final image size to **128MB**.
 
 ### Build the base image (first time or when dependencies change)