build(ci): added rclone 1.57.0 to Docker container images (#1718)

* build(ci): added rclone 1.57.0 to Docker container images

/bin/rclone is configured to use config in /app/rclone/rclone.conf
so the user can pass -v ~/.config/rclone:/app/rclone

* pr feedback

tools/docker/Dockerfile

@@ -1,11 +1,14 @@
 FROM gcr.io/distroless/static:nonroot
 ARG TARGETARCH
 
-# allow users to mount /app/config, /app/logs and /app/cache respectively
+# allow users to mount /app/config, /app/logs and /app/cache, /app/rclone respectively
 ENV KOPIA_CONFIG_PATH=/app/config/repository.config
 ENV KOPIA_LOG_DIR=/app/logs
 ENV KOPIA_CACHE_DIRECTORY=/app/cache
 
+# allow user to mount ~/.config/rclone to /app/rclone
+ENV RCLONE_CONFIG=/app/rclone/rclone.conf
+
 # this requires repository password to be passed via KOPIA_PASSWORD environment.
 ENV KOPIA_PERSIST_CREDENTIALS_ON_CONNECT=false
 ENV KOPIA_CHECK_FOR_UPDATES=false
@@ -13,6 +16,9 @@ ENV KOPIA_CHECK_FOR_UPDATES=false
 # this creates directories writable by the current user
 WORKDIR /app
 
+ENV PATH=/bin
+
 COPY bin-${TARGETARCH}/kopia .
+COPY bin-${TARGETARCH}/rclone /bin/rclone
 
 ENTRYPOINT ["/app/kopia"]