Clean-up of apt information in docker layers

Change-Id: I25949f4e61d327f61dfee8b7a9c3115738c445ac
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

docker/LCM/Dockerfile

@@ -68,7 +68,8 @@ FROM ubuntu:18.04
 RUN DEBIAN_FRONTEND=noninteractive apt-get --yes update && \
     DEBIAN_FRONTEND=noninteractive apt-get --yes install \
     python3-minimal=3.6.* \
-    ca-certificates
+    ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
 
 COPY --from=INSTALL /usr/lib/python3/dist-packages /usr/lib/python3/dist-packages
 COPY --from=INSTALL /usr/local/lib/python3.6/dist-packages  /usr/local/lib/python3.6/dist-packages

docker/MON/Dockerfile

@@ -55,7 +55,8 @@ FROM ubuntu:20.04 as FINAL
 RUN DEBIAN_FRONTEND=noninteractive apt-get --yes update && \
     DEBIAN_FRONTEND=noninteractive apt-get --yes install \
     python3-minimal=3.8.* \
-    ca-certificates
+    ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
 
 COPY --from=INSTALL /usr/lib/python3/dist-packages /usr/lib/python3/dist-packages
 COPY --from=INSTALL /usr/local/lib/python3.8/dist-packages  /usr/local/lib/python3.8/dist-packages

docker/NBI/Dockerfile

@@ -48,7 +48,8 @@ RUN pip3 install \
 FROM ubuntu:18.04 as FINAL
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get --yes update && \
-    DEBIAN_FRONTEND=noninteractive apt-get --yes install python3-minimal=3.6.*
+    DEBIAN_FRONTEND=noninteractive apt-get --yes install python3-minimal=3.6.* \
+    && rm -rf /var/lib/apt/lists/*
 
 COPY --from=INSTALL /usr/lib/python3/dist-packages /usr/lib/python3/dist-packages
 COPY --from=INSTALL /usr/local/lib/python3.6/dist-packages  /usr/local/lib/python3.6/dist-packages

docker/NG-UI/Dockerfile

@@ -27,7 +27,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get --yes update && \
 RUN curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add - && \
     echo "deb https://deb.nodesource.com/node_10.x xenial main" | tee -a /etc/apt/sources.list.d/nodesource.list && \
     apt-get update && \
-    apt-get install -y nodejs=10.24.*
+    apt-get install -y nodejs=10.24.* \
+    && rm -rf /var/lib/apt/lists/*
 
 ARG OSM_NGUI_URL
 

docker/PLA/Dockerfile

@@ -46,7 +46,8 @@ FROM ubuntu:18.04
 LABEL authors="Lars-Göran Magnusson"
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get --yes update && \
-    DEBIAN_FRONTEND=noninteractive apt-get --yes install python3-minimal=3.6.*
+    DEBIAN_FRONTEND=noninteractive apt-get --yes install python3-minimal=3.6.* \
+    && rm -rf /var/lib/apt/lists/*
 
 COPY --from=INSTALL /usr/lib/python3/dist-packages /usr/lib/python3/dist-packages
 COPY --from=INSTALL /usr/local/lib/python3.6/dist-packages  /usr/local/lib/python3.6/dist-packages

docker/POL/Dockerfile

@@ -48,7 +48,8 @@ RUN pip3 install \
 FROM ubuntu:20.04 as FINAL
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get --yes update && \
-    DEBIAN_FRONTEND=noninteractive apt-get --yes install python3-minimal=3.8.*
+    DEBIAN_FRONTEND=noninteractive apt-get --yes install python3-minimal=3.8.* \
+    && rm -rf /var/lib/apt/lists/*
 
 COPY --from=INSTALL /usr/lib/python3/dist-packages /usr/lib/python3/dist-packages
 COPY --from=INSTALL /usr/local/lib/python3.8/dist-packages  /usr/local/lib/python3.8/dist-packages

docker/RO/Dockerfile

@@ -81,7 +81,8 @@ RUN pip3 install \
 FROM ubuntu:18.04
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get --yes update && \
-    DEBIAN_FRONTEND=noninteractive apt-get --yes install python3-minimal=3.6.*
+    DEBIAN_FRONTEND=noninteractive apt-get --yes install python3-minimal=3.6.* \
+    && rm -rf /var/lib/apt/lists/*
 
 COPY --from=INSTALL /usr/lib/python3/dist-packages /usr/lib/python3/dist-packages
 COPY --from=INSTALL /usr/local/lib/python3.6/dist-packages  /usr/local/lib/python3.6/dist-packages