only one env line = less layers

Dockerfile

@@ -4,22 +4,23 @@ RUN \
     apk upgrade --update --no-cache && \
     apk add --update --no-cache nextcloud-client bash
 
-ENV USER_NAME=nextcloudclient
-ENV USER_UID=1000
-ENV USER_GID=1000
-ENV NEXTCLOUD_USERNAME=username
-ENV NEXTCLOUD_PASSWORD=password
-ENV NEXTCLOUD_URL=https://nextcloud.example.com
-ENV NEXTCLOUD_DIR=/data
-ENV NEXTCLOUD_DIR_CHOWN=1
-ENV NEXTCLOUD_FORCE_TRUST=
-ENV NEXTCLOUD_HTTPPROXY=
-ENV NEXTCLOUD_UPLIMIT=
-ENV NEXTCLOUD_DOWNLIMIT=
-ENV NEXTCLOUD_EXCLUDEFILE=
-ENV NEXTCLOUD_UNSYNCFILE=
-ENV NEXTCLOUD_SILENT=
-ENV NEXTCLOUD_SLEEP=30
+ENV \
+    USER_NAME=nextcloudclient \
+    USER_UID=1000 \
+    USER_GID=1000 \
+    NEXTCLOUD_USERNAME=username \
+    NEXTCLOUD_PASSWORD=password \
+    NEXTCLOUD_URL=https://nextcloud.example.com \
+    NEXTCLOUD_DIR=/data \
+    NEXTCLOUD_DIR_CHOWN=1 \
+    NEXTCLOUD_FORCE_TRUST= \
+    NEXTCLOUD_HTTPPROXY= \
+    NEXTCLOUD_UPLIMIT= \
+    NEXTCLOUD_DOWNLIMIT= \
+    NEXTCLOUD_EXCLUDEFILE= \
+    NEXTCLOUD_UNSYNCFILE= \
+    NEXTCLOUD_SILENT= \
+    NEXTCLOUD_SLEEP=30
 
 COPY start.sh /start.sh