Add image with Ubuntu base (#661)

docker/Dockerfile.ubuntu

@@ -0,0 +1,39 @@
+# syntax=docker/dockerfile:1.4
+FROM eclipse-temurin:21-jre
+
+MAINTAINER grimsi
+
+# Install necessary packages
+RUN apt-get update && \
+    apt-get install -y tini gosu && \
+    rm -rf /var/lib/apt/lists/*
+
+ENV USER=gameyfin
+
+RUN groupadd gameyfin && \
+    useradd -M -g gameyfin gameyfin
+
+WORKDIR /opt/gameyfin
+
+# Create necessary directories with appropriate permissions
+RUN mkdir -p plugins db data logs && \
+    chown -R gameyfin:gameyfin .
+
+# Copy entrypoint script and set permissions
+COPY --chown=gameyfin:gameyfin ./docker/entrypoint.ubuntu.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+# Copy application jar (not ending with -plain.jar)
+COPY --chown=gameyfin:gameyfin ./app/build/libs/ /tmp/app-libs/
+RUN find /tmp/app-libs -type f -name "*.jar" ! -name "*-plain.jar" -exec cp {} gameyfin.jar \; && \
+    rm -rf /tmp/app-libs
+
+# Copy all plugin jars
+COPY --chown=gameyfin:gameyfin ./plugins/ /tmp/plugins/
+RUN find /tmp/plugins -type f -path "*/build/libs/*.jar" -exec cp {} plugins/ \; && \
+    rm -rf /tmp/plugins
+
+EXPOSE 8080
+
+ENTRYPOINT ["/usr/bin/tini", "--", "/entrypoint.sh"]
+

docker/entrypoint.ubuntu.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+set -e
+
+if [ -n "$PUID" ] && [ -n "$PGID" ]; then
+  groupmod -o -g "$PGID" gameyfin
+  usermod -o -u "$PUID" gameyfin
+  chown -R gameyfin:gameyfin /opt/gameyfin
+  exec gosu gameyfin:gameyfin java -jar gameyfin.jar
+else
+  exec gosu gameyfin:gameyfin java -jar gameyfin.jar
+fi
+