Use start-tor-browser as ENTRYPOINT

Any extra commands given at 'docker run' time should be passed to the
script, and onward to the firefox binary:
[...]
./firefox --class "Tor Browser" -profile TorBrowser/Data/Browser/profile.default "${@}"

Dockerfile

@@ -50,6 +50,5 @@ RUN curl --fail -O -sSL ${RELEASE_URL} && \
 WORKDIR /usr/local/bin/Browser/Downloads
 USER user
 
-COPY [ "start.sh", "/usr/local/bin/" ]
-
-CMD [ "start.sh" ]
+ENTRYPOINT ["start-tor-browser"]
+CMD [""]

start.sh

@@ -1,4 +0,0 @@
-#!/bin/bash
-
-/usr/local/bin/Browser/start-tor-browser
-