fix indentation

Dockerfile.linux.amd64

@@ -2,7 +2,6 @@ FROM alpine:3.10
 
 LABEL maintainer="Robert Kaussow <mail@geeklabor.de>" \
     org.label-schema.name="Nginx" \
-    org.label-schema.version="1.2" \
     org.label-schema.vendor="Robert Kaussow" \
     org.label-schema.schema-version="1.0"
 
@@ -21,9 +20,9 @@ RUN addgroup -g 101 -S nginx && \
     chown -R nginx /var/log/nginx && \
     mkdir -p /var/cache/nginx && \
     chown -R nginx /var/cache/nginx && \
-	chmod -R 750 /var/cache/nginx && \
+    chmod -R 750 /var/cache/nginx && \
     chown -R nginx:nginx /var/www && \
-	chmod -R 750 /var/www && \
+    chmod -R 750 /var/www && \
     apk del .build-deps && \
     rm -rf /var/cache/apk/* && \
     rm -rf /tmp/*