diff --git a/Dockerfile b/Dockerfile
index 7604f68..3d5e920 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -67,6 +67,9 @@ RUN \
     /root/.composer \
     /tmp/*
 
+# copy local files
 COPY root/ /
 
+# ports and volumes
 EXPOSE 80 443
+VOLUME /config
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 64a5837..017a6ea 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -67,6 +67,9 @@ RUN \
     /root/.composer \
     /tmp/*
 
+# copy local files
 COPY root/ /
 
+# ports and volumes
 EXPOSE 80 443
+VOLUME /config
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index ced74e8..0f79aa0 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -67,6 +67,9 @@ RUN \
     /root/.composer \
     /tmp/*
 
+# copy local files
 COPY root/ /
 
+# ports and volumes
 EXPOSE 80 443
+VOLUME /config