Single stage build, support stdc++fs for GCC8, update README

Dockerfile

@@ -1,32 +1,14 @@
 #syntax = docker/dockerfile:1.4.0
 
 FROM quay.io/centos/centos:stream AS buildbase
-RUN yum -y install tar unzip glibc.i686 gcc dos2unix make gcc-c++ && yum clean all && rm -rf /var/cache/yum
+RUN yum -y install tar unzip glibc.i686 gcc dos2unix cmake gcc-c++ && yum clean all && rm -rf /var/cache/yum
 RUN mkdir -p ~/uox3
 
-FROM buildbase AS buildjs
-COPY automake.sh /root/uox3
-COPY spidermonkey /root/uox3/spidermonkey/
-RUN find /root/uox3 -name \* -type f -exec dos2unix {} \;
-RUN cd /root/uox3 && ./automake.sh 1
-CMD ["/bin/bash"]
-
-FROM buildbase AS buildzlib
-COPY automake.sh /root/uox3
-COPY zlib /root/uox3/zlib/
-RUN find /root/uox3 -name \* -type f -exec dos2unix {} \;
-RUN cd /root/uox3 && ./automake.sh 2
-CMD ["/bin/bash"]
-
 FROM buildbase AS buildapp
 WORKDIR /root/uox3
-RUN mkdir -p spidermonkey && mkdir -p zlib
-COPY automake.sh .
-COPY source source/
+COPY . .
 RUN find /root/uox3 -name \* -type f -exec dos2unix {} \;
-COPY --from=buildjs   /root/uox3/spidermonkey spidermonkey/
-COPY --from=buildzlib /root/uox3/zlib         zlib/
-RUN cd /root/uox3 && ./automake.sh 3
+RUN cd /root/uox3 && ./automake.sh
 CMD ["/bin/bash"]
 
 FROM quay.io/centos/centos:stream 

README.md

@@ -26,6 +26,7 @@ Join the [UOX3 Discord](https://discord.gg/uBAXxhF) for support and/or a quick c
   > * **Linux (Debian-based)** - Run `sudo apt install build-essential cmake` in a Terminal:  (or use your Linux distro's package manager)
   > * **FreeBSD** - Run `pkg install cmake` in a Terminal. Alternatively, build `cmake` via ports if desired.
   > * **macOS** - Download [Xcode](https://apps.apple.com/us/app/xcode/id497799835?mt=12) (for building with an IDE) via the App Store, and/or [CMake](https://cmake.org/download/) (for command-line builds)
+  > * **Docker** - Ensure that it is downloaded and installed (Windows) or installed from your package manager
 </details>
 
 <details>
@@ -157,6 +158,11 @@ Join the [UOX3 Discord](https://discord.gg/uBAXxhF) for support and/or a quick c
 
 </details>
 </details>
+<details>
+  <summary><strong>Docker</strong></summary>
+
+  Build and tag the image from the root of the repository like `docker buildx build --progress=plain -t uox3 .`
+</details>
 
 ---
 ## UOX3 Compiled! Now what?

make/cmake/CMakeLists.txt

@@ -236,6 +236,7 @@ target_link_libraries(uox3 PRIVATE
 	$<$<PLATFORM_ID:Windows>:Kernel32>
 	$<$<PLATFORM_ID:Linux>:pthread>
    $<$<PLATFORM_ID:FreeBSD>:pthread>
+   $<$<AND:$<CXX_COMPILER_ID:GNU>,$<VERSION_LESS:$<CXX_COMPILER_VERSION>,9.0>>:stdc++fs>
 )
 
 # *************************************************************************