Add StarshipOS branding and global dark theme to both XWiki instances

- Global high-contrast dark theme (#000000 bg / #ffffff fg) via
  cssVariablesInit.min.css override for xwiki-org and xwiki-com
- StarshipOS SVG logo (Santino Shiba Inu badge + logotype)
- SVG, 16px and 144px PNG favicons from the same badge design
- docker-compose.yml bind-mounts all assets so changes survive restarts

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,118 @@
+services:
+
+  postgres:
+    image: postgres:16
+    container_name: strshipos-postgres
+    restart: unless-stopped
+    environment:
+      POSTGRES_PASSWORD: ${POSTGRES_ROOT_PASSWORD}
+    volumes:
+      - ./postgres/data:/var/lib/postgresql/data
+      - ./postgres/init:/docker-entrypoint-initdb.d:ro
+    networks:
+      - internal
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  gitea:
+    image: gitea/gitea:latest
+    container_name: strshipos-gitea
+    restart: unless-stopped
+    depends_on:
+      postgres:
+        condition: service_healthy
+    environment:
+      - USER_UID=1000
+      - USER_GID=1000
+      - GITEA__database__DB_TYPE=postgres
+      - GITEA__database__HOST=postgres:5432
+      - GITEA__database__NAME=gitea
+      - GITEA__database__USER=gitea
+      - GITEA__database__PASSWD=${GITEA_DB_PASSWORD}
+      - GITEA__server__DOMAIN=gitea.strshipos.com
+      - GITEA__server__SSH_DOMAIN=gitea.strshipos.com
+      - GITEA__server__ROOT_URL=https://gitea.strshipos.com/
+      - GITEA__server__HTTP_PORT=3000
+      - GITEA__server__SSH_PORT=2222
+      - GITEA__server__SSH_LISTEN_PORT=22
+      - GITEA__security__SECRET_KEY=${GITEA_SECRET_KEY}
+      - GITEA__service__DISABLE_REGISTRATION=false
+    volumes:
+      - ./gitea/data:/data
+    ports:
+      - "127.0.0.1:3000:3000"
+      - "0.0.0.0:2222:22"
+    networks:
+      - internal
+
+  nexus:
+    image: sonatype/nexus3:latest
+    container_name: strshipos-nexus
+    restart: unless-stopped
+    environment:
+      - INSTALL4J_ADD_VM_PARAMS=-Xms256m -Xmx768m -XX:MaxDirectMemorySize=512m -Djava.util.prefs.userRoot=/nexus-data/jvm
+    volumes:
+      - ./nexus/data:/nexus-data
+    ports:
+      - "127.0.0.1:8081:8081"
+    networks:
+      - internal
+
+  xwiki-org:
+    image: xwiki:lts-postgres-tomcat
+    container_name: strshipos-xwiki-org
+    restart: unless-stopped
+    depends_on:
+      postgres:
+        condition: service_healthy
+    environment:
+      - DB_HOST=postgres
+      - DB_PORT=5432
+      - DB_DATABASE=xwiki_org
+      - DB_USER=xwiki_org
+      - DB_PASSWORD=${XWIKI_ORG_DB_PASSWORD}
+      - JAVA_OPTS=-Xms256m -Xmx512m
+    volumes:
+      - ./xwiki-org/data:/usr/local/xwiki
+      - ./xwiki-org/cssVariablesInit.min.css:/usr/local/tomcat/webapps/ROOT/skins/flamingo/cssVariablesInit.min.css
+      - ./logo.svg:/usr/local/tomcat/webapps/ROOT/skins/flamingo/logo.svg
+      - ./favicon.svg:/usr/local/tomcat/webapps/ROOT/resources/icons/xwiki/favicon.svg
+      - ./favicon16.png:/usr/local/tomcat/webapps/ROOT/resources/icons/xwiki/favicon16.png
+      - ./favicon144.png:/usr/local/tomcat/webapps/ROOT/resources/icons/xwiki/favicon144.png
+    ports:
+      - "127.0.0.1:8090:8080"
+    networks:
+      - internal
+
+  xwiki-com:
+    image: xwiki:lts-postgres-tomcat
+    container_name: strshipos-xwiki-com
+    restart: unless-stopped
+    depends_on:
+      postgres:
+        condition: service_healthy
+    environment:
+      - DB_HOST=postgres
+      - DB_PORT=5432
+      - DB_DATABASE=xwiki_com
+      - DB_USER=xwiki_com
+      - DB_PASSWORD=${XWIKI_COM_DB_PASSWORD}
+      - JAVA_OPTS=-Xms256m -Xmx512m
+    volumes:
+      - ./xwiki-com/data:/usr/local/xwiki
+      - ./xwiki-com/cssVariablesInit.min.css:/usr/local/tomcat/webapps/ROOT/skins/flamingo/cssVariablesInit.min.css
+      - ./logo.svg:/usr/local/tomcat/webapps/ROOT/skins/flamingo/logo.svg
+      - ./favicon.svg:/usr/local/tomcat/webapps/ROOT/resources/icons/xwiki/favicon.svg
+      - ./favicon16.png:/usr/local/tomcat/webapps/ROOT/resources/icons/xwiki/favicon16.png
+      - ./favicon144.png:/usr/local/tomcat/webapps/ROOT/resources/icons/xwiki/favicon144.png
+    ports:
+      - "127.0.0.1:8091:8080"
+    networks:
+      - internal
+
+networks:
+  internal:
+    driver: bridge