set --output-directory to "out"

cli/Dockerfile

@@ -3,10 +3,10 @@ FROM zenika/alpine-chrome:with-node
 RUN set -x \
     git \
     && git clone --depth 1 --recursive https://github.com/gildas-lormeau/SingleFile \
-    && cd SingleFile && npm install --production && cd cli && npm install --production \
+    && cd SingleFile && npm install --production && cd cli && mkdir out && npm install --production \
     && chmod +x single-file \
     && echo
-    
+
 WORKDIR /usr/src/app/SingleFile/cli
 
-ENTRYPOINT ["./single-file", "--browser-executable-path", "/usr/bin/chromium-browser", "--dump-content", "--browser-args", "[\"--no-sandbox\"]"]
+ENTRYPOINT ["./single-file", "--browser-executable-path", "/usr/bin/chromium-browser", "--dump-content", "--output-directory", "out", "--browser-args", "[\"--no-sandbox\"]"]