Dockerfile: use alpine to reduce size (#9226)

* Dockerfile: use alpine to reduce size

* Fix the UID & GID + alpine version + rights

* Reduce the junk when we copy, only copy needed files

* Build in the right cmake place & permit customize mtg version

* Latest build fixes

Co-authored-by: Loïc Blot <nerzhul@users.noreply.github.com>

Dockerfile

@@ -1,32 +1,44 @@
-FROM debian:buster
+FROM alpine:3.11
 
-USER root
+ENV MINETEST_GAME_VERSION master
-RUN apt-get update -y && \
-	apt-get -y install build-essential libirrlicht-dev cmake libbz2-dev libpng-dev libjpeg-dev \
-		libsqlite3-dev libcurl4-gnutls-dev zlib1g-dev libgmp-dev libjsoncpp-dev git
 
-COPY . /usr/src/minetest
+COPY .git /usr/src/minetest/.git
+COPY CMakeLists.txt /usr/src/minetest/CMakeLists.txt
+COPY README.md /usr/src/minetest/README.md
+COPY minetest.conf.example /usr/src/minetest/minetest.conf.example
+COPY builtin /usr/src/minetest/builtin
+COPY cmake /usr/src/minetest/cmake
+COPY doc /usr/src/minetest/doc
+COPY fonts /usr/src/minetest/fonts
+COPY lib /usr/src/minetest/lib
+COPY misc /usr/src/minetest/misc
+COPY po /usr/src/minetest/po
+COPY src /usr/src/minetest/src
+COPY textures /usr/src/minetest/textures
 
-RUN	mkdir -p /usr/src/minetest/cmakebuild && cd /usr/src/minetest/cmakebuild && \
+WORKDIR /usr/src/minetest
-    	cmake -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DRUN_IN_PLACE=FALSE \
+
+RUN apk add --no-cache git build-base irrlicht-dev cmake bzip2-dev libpng-dev \
+		jpeg-dev libxxf86vm-dev mesa-dev sqlite-dev libogg-dev \
+		libvorbis-dev openal-soft-dev curl-dev freetype-dev zlib-dev \
+		gmp-dev jsoncpp-dev postgresql-dev && \
+	git clone --depth=1 -b ${MINETEST_GAME_VERSION} https://github.com/minetest/minetest_game.git ./games/minetest_game && \
+	rm -fr ./games/minetest_game/.git && \
+	mkdir build && \
+	cd build && \
+	cmake .. \
+		-DCMAKE_INSTALL_PREFIX=/usr/local \
+		-DCMAKE_BUILD_TYPE=Release \
 		-DBUILD_SERVER=TRUE \
-		-DBUILD_CLIENT=FALSE \
+		-DBUILD_CLIENT=FALSE && \
-		-DENABLE_SYSTEM_JSONCPP=1 \
-		.. && \
 	make -j2 && \
-		rm -Rf ../games/minetest_game && git clone --depth 1 https://github.com/minetest/minetest_game ../games/minetest_game && \
-		rm -Rf ../games/minetest_game/.git && \
 	make install
 
-FROM debian:stretch
+FROM alpine:3.11
 
-USER root
+RUN apk add --no-cache sqlite-libs curl gmp libstdc++ libgcc libpq && \
-RUN groupadd minetest && useradd -m -g minetest -d /var/lib/minetest minetest && \
+	adduser -D minetest --uid 30000 -h /var/lib/minetest && \
-    apt-get update -y && \
+	chown -R minetest:minetest /var/lib/minetest
-    apt-get -y install libcurl3-gnutls libjsoncpp1 liblua5.1-0 libluajit-5.1-2 libpq5 libsqlite3-0 \
-        libstdc++6 zlib1g libc6 && \
-    apt-get clean && rm -rf /var/cache/apt/archives/* && \
-    rm -rf /var/lib/apt/lists/*
 
 WORKDIR /var/lib/minetest
 
@@ -34,7 +46,7 @@ COPY --from=0 /usr/local/share/minetest /usr/local/share/minetest
 COPY --from=0 /usr/local/bin/minetestserver /usr/local/bin/minetestserver
 COPY --from=0 /usr/local/share/doc/minetest/minetest.conf.example /etc/minetest/minetest.conf
 
-USER minetest
+USER minetest:minetest
 
 EXPOSE 30000/udp