diff --git a/support/build.Dockerfile b/support/build.Dockerfile
index de6f990..af5ed9b 100644
--- a/support/build.Dockerfile
+++ b/support/build.Dockerfile
@@ -3,9 +3,9 @@ COPY . /gossaSrc
 RUN cd /gossaSrc && make
 
 FROM alpine
-ENV UID="1000" GID="1000" HOST="0.0.0.0" PORT="8001" PREFIX="/" FOLLOW_SYMLINKS="false" SKIP_HIDDEN_FILES="true" DATADIR="/shared"
+ENV UID="1000" GID="1000" HOST="0.0.0.0" PORT="8001" PREFIX="/" FOLLOW_SYMLINKS="false" SKIP_HIDDEN_FILES="true" DATADIR="/shared" READONLY="false"
 EXPOSE 8001
 RUN apk add --no-cache su-exec
 COPY --from=builder /gossaSrc/gossa /gossa
-RUN echo -e 'exec su-exec ${UID}:${GID} /gossa -h ${HOST} -p ${PORT} -k=${SKIP_HIDDEN_FILES} --symlinks=${FOLLOW_SYMLINKS} --prefix=${PREFIX} ${DATADIR}'>> /start.sh
+RUN echo -e 'exec su-exec ${UID}:${GID} /gossa -h ${HOST} -p ${PORT} -k=${SKIP_HIDDEN_FILES} -ro=${READONLY} --symlinks=${FOLLOW_SYMLINKS} --prefix=${PREFIX} ${DATADIR}'>> /start.sh
 ENTRYPOINT [ "sh", "/start.sh" ]