add alpine docker to build mscp as a single binary

The build recipe in docker/alpine-3.17.Dockerfile uses conan to
build mscp as a single binary (with statically linked musl).

Now the mscp binary is portable!

.github/workflows/release.yml

@@ -49,6 +49,7 @@ jobs:
             ${{github.workspace}}/build/mscp_${{env.VERSION}}-ubuntu-22.04-x86_64.deb
             ${{github.workspace}}/build/mscp_${{env.VERSION}}-centos-8-x86_64.rpm
             ${{github.workspace}}/build/mscp_${{env.VERSION}}-rocky-8.6-x86_64.rpm
+            ${{github.workspace}}/build/mscp_${{env.VERSION}}-apline-3.17-x86_64.static
 
   source-release:
     runs-on: ubuntu-latest

CMakeLists.txt

@@ -129,9 +129,9 @@ include(CPack)
 # Custom targets to build and test mscp in docker containers.
 # foreach(IN ZIP_LISTS) (cmake >= 3.17) can shorten the following lists.
 # However, ubuntu 20.04 has cmake 3.16.3. So this is a roundabout trick.
-list(APPEND DIST_NAMES	ubuntu	ubuntu	centos	rocky)
-list(APPEND DIST_VERS	20.04	22.04	8	8.6)
-list(APPEND DIST_PKGS	deb	deb	rpm	rpm)
+list(APPEND DIST_NAMES	ubuntu	ubuntu	centos	rocky	alpine)
+list(APPEND DIST_VERS	20.04	22.04	8	8.6	3.17)
+list(APPEND DIST_PKGS	deb	deb	rpm	rpm	static)
 
 list(LENGTH DIST_NAMES _DIST_LISTLEN)
 math(EXPR DIST_LISTLEN "${_DIST_LISTLEN} - 1")

docker/alpine-3.17.Dockerfile

@@ -0,0 +1,35 @@
+FROM alpine:3.17
+
+# Build mscp with conan to create single binary mscp
+
+ARG mscpdir="/mscp"
+
+COPY . ${mscpdir}
+
+RUN apk add --no-cache \
+	gcc make cmake python3 py3-pip perl linux-headers libc-dev	\
+	openssh bash python3-dev g++
+
+RUN pip3 install conan pytest numpy
+
+# Build mscp as a single binary
+RUN conan profile detect --force
+RUN cd ${mscpdir}							\
+	&& rm -rf build							\
+	&& conan install . --output-folder=build --build=missing	\
+	&& cd ${mscpdir}/build						\
+	&& cmake ..							\
+		-DCMAKE_BUILD_TYPE=Release				\
+		-DCMAKE_TOOLCHAIN_FILE=conan_toolchain.cmake		\
+		-DBUILD_STATIC=ON -DBUILD_CONAN=ON			\
+	&& make								\
+	&& cp mscp /usr/bin/						\
+	&& cp mscp /mscp/build/mscp_0.0.6-alpine-3.17-x86_64.static
+
+# copy mscp to PKG FILE NAME because this build doesn't use CPACK
+
+# preparation for sshd
+RUN ssh-keygen -A
+RUN  mkdir /var/run/sshd        \
+        && ssh-keygen -f /root/.ssh/id_rsa -N ""                \
+        && mv /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys