chore: remove baked-in etc/, mount at runtime instead

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

Author: Ingvord

Dockerfile

@@ -2,11 +2,10 @@ FROM eclipse-temurin:21-jre-alpine
 
 RUN apk add --no-cache dumb-init
 
-LABEL maintainer="igor.khokhriakov@hzg.de"
+LABEL maintainer="ingvord@mail.ru"
 
 ARG JAR_FILE
 ADD target/${JAR_FILE} /app/bin/ss.jar
-ADD etc /app/etc
 
 RUN addgroup --system javauser && adduser -S -s /bin/false -G javauser javauser
 RUN chown -R javauser /app