bump up container image versions and drop using CPack

We have already provided DEB packages in launchpad PPA and RPM packages
in COPR. Thus, we need no more deb/rpm packages in Github releases. The
single binary build of mscp is an execptio.

Updated container image versions:
- almalinux	8.8  -> 9.3
- rocky		8.8  -> 8.9, and 9.3 is added
- alpine	3.17 -> 3.19

Dockerfile/alpine-3.19.Dockerfile

@@ -0,0 +1,35 @@
+FROM alpine:3.19
+
+# Build mscp with conan to create single binary mscp
+
+RUN apk add --no-cache \
+	gcc make cmake python3 py3-pip perl linux-headers libc-dev	\
+	openssh bash python3-dev py3-pytest g++
+
+RUN pip3 install --break-system-packages conan
+
+# 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
+
+
+# Build mscp as a single binary
+RUN conan profile detect --force
+
+ARG mscpdir="/mscp"
+
+COPY . ${mscpdir}
+
+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_CONAN=ON -DBUILD_STATIC=ON			\
+	&& make	-j 2							\
+	&& make install
+