fixed debian/raspbian selection

frontend/Dockerfile

@@ -11,7 +11,9 @@ RUN apt-get update && apt-get -y install\
 
 ARG ZABBIX_VERSION=4.0
 
-RUN wget http://repo.zabbix.com/zabbix/${ZABBIX_VERSION}/$(grep -E '^ID=' /etc/os-release | cut -d= -f2)/pool/main/z/zabbix-release/zabbix-release_${ZABBIX_VERSION}-1+stretch_all.deb -O /tmp/zabbix.deb &&\
+RUN if [ "$(uname -m)" = "x86_64" ]; then echo -n "debian"; else echo -n "raspbian"; fi > /tmp/distrib &&\
+    wget http://repo.zabbix.com/zabbix/${ZABBIX_VERSION}/$(cat /tmp/distrib)/pool/main/z/zabbix-release/zabbix-release_${ZABBIX_VERSION}-1+stretch_all.deb -O /tmp/zabbix.deb &&\
+    rm /tmp/distrib &&\
     dpkg -i /tmp/zabbix.deb
 
 RUN apt-get update && apt-get -y install\

zabbix/Dockerfile

@@ -10,7 +10,9 @@ ARG ZABBIX_VERSION=4.0
 
 RUN sed -i 's/main/main non-free/' /etc/apt/sources.list
 
-RUN wget http://repo.zabbix.com/zabbix/${ZABBIX_VERSION}/$(grep -E '^ID=' /etc/os-release | cut -d= -f2)/pool/main/z/zabbix-release/zabbix-release_${ZABBIX_VERSION}-1+stretch_all.deb -O /tmp/zabbix.deb &&\
+RUN if [ "$(uname -m)" = "x86_64" ]; then echo -n "debian"; else echo -n "raspbian"; fi > /tmp/distrib &&\
+    wget http://repo.zabbix.com/zabbix/${ZABBIX_VERSION}/$(cat /tmp/distrib)/pool/main/z/zabbix-release/zabbix-release_${ZABBIX_VERSION}-1+stretch_all.deb -O /tmp/zabbix.deb &&\
+    rm /tmp/distrib &&\
     dpkg -i /tmp/zabbix.deb
 
 RUN apt-get update && apt-get -y install\