fix build broken by COPY peculiarity

COPY [--chown=<user>:<group>] <src>... <dest>
The <src> path must be inside the context of the build; you cannot COPY ../something /something,
because the first step of a docker build is to send the context directory (and subdirectories)
to the docker daemon.
If <src> is a directory, the entire contents of the directory are copied, including filesystem metadata.
!!!!The directory itself is not copied, just its contents.!!!!

Signed-off-by: Nagy Károly Gábriel <k@jpi.io>

Dockerfile

@@ -1,7 +1,7 @@
 FROM scratch
 
 # Copy everything
-COPY binnit /
+COPY ./files /
 
 # Set our port
 EXPOSE 80