add dockerfiles for build containers

docker/el7

@@ -0,0 +1,17 @@
+FROM centos:7
+
+LABEL description="Container in which to build el7 applications"
+
+ENV TZ=America/Glace_Bay
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+RUN yum install -y gcc rpm-build rpm-devel rpmlint make python python3 bash coreutils diffutils patch rpmdevtools
+
+RUN mkdir -p /home/rpm/rpmbuild/{BUILD,BUILDROOT,RPMS,SOURCES,SPECS,SRPMS,tmp}
+
+RUN echo %_topdir /home/rpm/rpmbuild > /etc/rpm/macros
+RUN echo %_tmppath %{_topdir}/tmp >> /etc/rpm/macros
+
+RUN chmod -R 777 /home/rpm
+
+RUN ln -fs /usr/bin/python3 /usr/bin/python

docker/el8

@@ -0,0 +1,15 @@
+FROM centos:8
+
+LABEL description="Container in which to build el8 applications"
+
+ENV TZ=America/Glace_Bay
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+RUN dnf install -y gcc rpm-build rpm-devel rpmlint make python3 bash diffutils patch rpmdevtools
+
+RUN mkdir -p /home/rpm/rpmbuild/{BUILD,BUILDROOT,RPMS,SOURCES,SPECS,SRPMS,tmp}
+
+RUN echo %_topdir /home/rpm/rpmbuild > /etc/rpm/macros
+RUN echo %_tmppath %{_topdir}/tmp >> /etc/rpm/macros
+
+RUN chmod -R 777 /home/rpm

docker/ubuntu

@@ -0,0 +1,8 @@
+FROM ubuntu:focal
+
+LABEL description="Container in which to build ubuntu applications"
+
+ENV TZ=America/Glace_Bay
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+RUN apt update && apt install -y make build-essential fakeroot devscripts debhelper python3