Merge remote-tracking branch 'bpodrygajlo/ci-docker-speedup' into integration_2026_w28

ci: Speedup fhi72 dockerfiles (#261)

Move "COPY . ." down in 7.2 dockerfiles. This layer doesn't cache well
due to changes in docker context, moving it down allows docker builder
to cache other layers that are not affected by the context.

Reviewed-by: Jaroslava Fiedlerova <jaroslava.fiedlerova@openairinterface.org>

docker/Dockerfile.build.fhi72.native_arm.ubuntu

@@ -27,7 +27,6 @@ RUN apt-get update && \
 
 RUN rm -Rf /oai-ran
 WORKDIR /oai-ran
-COPY . .
 
 ## Download and build DPDK
 RUN wget --no-verbose http://fast.dpdk.org/rel/dpdk-24.11.4.tar.xz && \
@@ -54,6 +53,8 @@ RUN git clone https://git.gitlab.arm.com/networking/ral.git /opt/ral && \
     ninja && \
     ninja install
 
+COPY . .
+
 FROM ran-base AS ran-build-fhi72
 ## Build and install OAI
 #run build_oai to build the target image

docker/Dockerfile.build.fhi72.rhel9

@@ -12,7 +12,6 @@ ENV TZ=Europe
 
 RUN rm -Rf /oai-ran
 WORKDIR /oai-ran
-COPY . .
 
 ARG xran_VERSION=11.1.2
 
@@ -31,6 +30,8 @@ RUN git clone https://github.com/openairinterface/o-du-phy.git /opt/phy && \
     cd /opt/phy/fhi_lib/lib && \
     WIRELESS_SDK_TOOLCHAIN=gcc RTE_SDK=/oai-ran/dpdk-stable-24.11.4/ XRAN_DIR=/opt/phy/fhi_lib make XRAN_LIB_SO=1
 
+COPY . .
+
 FROM ran-base AS ran-build-fhi72
 ARG E2AP_VERSION=E2AP_V3
 ARG KPM_VERSION=KPM_V3_00

docker/Dockerfile.build.fhi72.t2.ubuntu

@@ -27,7 +27,7 @@ RUN apt-get update && \
 
 RUN rm -Rf /oai-ran
 WORKDIR /oai-ran
-COPY . .
+
 ## Copy T2 patch
 COPY ./$T2_PATCH /opt/.
 ## Download and build DPDK
@@ -46,6 +46,8 @@ RUN git clone https://github.com/openairinterface/o-du-phy.git /opt/phy && \
     cd /opt/phy/fhi_lib/lib && \
     WIRELESS_SDK_TOOLCHAIN=gcc RTE_SDK=/oai-ran/dpdk-$DPDK_VERSION/ XRAN_DIR=/opt/phy/fhi_lib make XRAN_LIB_SO=1
 
+COPY . .
+
 FROM ran-base AS ran-build-fhi72-t2
 ## Build and install OAI
 ## Run build_oai to build the target image, if T2 patch present, build with T2 support

docker/Dockerfile.build.fhi72.ubuntu

@@ -32,7 +32,6 @@ RUN apt-get update && \
 
 RUN rm -Rf /oai-ran
 WORKDIR /oai-ran
-COPY . .
 
 RUN git clone https://github.com/CESNET/libyang.git && \
     cd libyang && \
@@ -81,6 +80,8 @@ RUN git clone https://github.com/openairinterface/o-du-phy.git /opt/phy && \
     cd /opt/phy/fhi_lib/lib && \
     WIRELESS_SDK_TOOLCHAIN=gcc RTE_SDK=/oai-ran/dpdk-stable-24.11.4/ XRAN_DIR=/opt/phy/fhi_lib make XRAN_LIB_SO=1
 
+COPY . .
+
 FROM ran-base AS ran-build-fhi72
 ## Build and install OAI
 #run build_oai to build the target image