feat(docker): upgrade to Java 21, add healthchecks, host network, BuildKit cache

Author: madkoding

.env.example

@@ -0,0 +1,5 @@
+# SlimeVR Docker - Configuration Examples
+# Copy to .env and customize if needed
+
+# WEBGUI_PORT=8080
+# SLIMEVR_VERSION=latest

docker-compose.linux.yml

@@ -8,30 +8,40 @@ services:
     restart: unless-stopped
     environment:
       - LIBGL_ALWAYS_INDIRECT=0
-    ports:
-      - "6969:6969/udp" # Tracker data (SlimeVR default UDP port)
-      - "21110:21110" # WebSocket VR Bridge for integrations
-      - "8266:8266" # OTA firmware update
-      - "9000:9000" # OSC output (shared by VRC and router)
-      - "9001:9001" # VRC OSC input (VRChat tracking)
-      - "9002:9002" # OSC Router input (for rerouting OSC)
-      - "39539:39539" # VMC output (used by VSeeFace, etc.)
-      - "39540:39540" # VMC input
-      - "4768:4768/udp" # Tracker discovery / legacy LAN detection
+    network_mode: host
+    privileged: true
+    devices:
+      - /dev/dri:/dev/dri
+    group_add:
+      - dialout
+      - video
     volumes:
       - slimevr-config:/root/.config/dev.slimevr.SlimeVR
       - slimevr-gui:/gui_mount
+      - /dev:/dev
+      - /run/udev:/run/udev:ro
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:6969"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 10s
 
   nginx:
     build: ./nginx
     container_name: slimevr_gui
     restart: unless-stopped
     environment:
       WEBGUI_PORT: ${WEBGUI_PORT:-8080}
-    ports:
-      - "${WEBGUI_PORT:-8080}:${WEBGUI_PORT:-8080}"
+    network_mode: host
     volumes:
       - slimevr-gui:/usr/share/nginx/html:ro
+    healthcheck:
+      test: ["CMD", "wget", "-q", "--spider", "http://localhost:${WEBGUI_PORT:-8080}/"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 5s
 
 volumes:
   slimevr-config:

docker-compose.yml

@@ -1,13 +1,18 @@
-FROM eclipse-temurin:17-jdk
+# syntax=docker/dockerfile:1.4
+FROM eclipse-temurin:21-jre
 
 ARG SLIMEVR_VERSION=latest
 ENV SLIMEVR_VERSION=${SLIMEVR_VERSION}
 
 WORKDIR /app
 
-RUN apt-get update && \
+RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
+    --mount=type=cache,target=/var/lib/apt,sharing=locked \
+    apt-get update && \
     apt-get install -y --no-install-recommends curl libusb-1.0-0 udev && \
-    if [ "${SLIMEVR_VERSION}" = "latest" ] || [ -z "${SLIMEVR_VERSION}" ]; then \
+    apt-get clean
+
+RUN if [ "${SLIMEVR_VERSION}" = "latest" ] || [ -z "${SLIMEVR_VERSION}" ]; then \
         echo "Fetching latest SlimeVR version..." && \
         SLIMEVR_VERSION=$(curl -sL https://api.github.com/repos/SlimeVR/SlimeVR-Server/releases/latest | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/' | sed 's/^v//') && \
         echo "Latest version: ${SLIMEVR_VERSION}"; \
@@ -16,9 +21,7 @@ RUN apt-get update && \
     curl -L -o slimevr-gui-dist.tar.gz https://github.com/SlimeVR/SlimeVR-Server/releases/download/v${SLIMEVR_VERSION}/slimevr-gui-dist.tar.gz && \
     mkdir /gui && \
     tar -xzf slimevr-gui-dist.tar.gz -C /gui && \
-    rm slimevr-gui-dist.tar.gz && \
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/*
+    rm slimevr-gui-dist.tar.gz
 
 VOLUME ["/gui_mount"]