update README

README.md

@@ -1,9 +1,9 @@
-# rtems6-powerpc
-
 A container that makes the RTEMS powerpc beatnik Board Support Package (BSP).
 
 This container gets the sources from RTEMS releases, builds the toolchain and then compiles the BSP.
 
+The developer target serves as an archive for the source code. The runtime target is a minmal container with the RTEMS powerpc-beatnik BSP only, intended to be used as a base for epics-base builds.
+
 The current configuration is:-
 - rtems version: 6.1-rc2
 - patches for MVME5500 boards used at DLS
@@ -12,23 +12,3 @@ The current configuration is:-
 This container can be run to experiment with building components with the RSP and prebuilt rtems6 toolchain.
 
 See https://docs.rtems.org/branches/master/user/start/index.html
-
-To just get the Board Support Package (BSP) with toolchain, you can extract these products into your own container with:
-
-```
-ENV RTEMS_VERSION=6.1-rc2
-ENV RTEMS_TOP=/rtems${RTEMS_VERSION}-beatnik-legacy/rtems/${RTEMS_VERSION}/
-ENV RTEMS_BSP_IMAGE=ghcr.io/epics-containers/rtems6-powerpc-linux-developer
-
-COPY --from=${RTEMS_BSP_IMAGE}:${RTEMS_VERSION} ${RTEMS_TOP} ${RTEMS_TOP}
-```
-
-Or you can get the BSP locally with:
-```
-docker run --rm -v $(pwd):/workdir ghcr.io/epics-containers/rtems6-powerpc-linux-developer:6.1-rc2
-# in another terminal
-mkdir -p /rtems6-beatnik-legacy/rtems/
-docker cp $(docker ps -lq):/rtems6-beatnik-legacy/rtems/6.1-rc2/ /rtems6-beatnik-legacy/rtems/6.1-rc2/
-```
-
-IMPORTANT: the BSP contains absolute paths so you must copy it to the same path as inside the container.