appimage: README.md update (add example on how to run inside docker)

While AppImage attempts to be a more portable way of running
applications across linux installations, sometime is maybe necessary
to run inside docker.

So examples are provided, which also provides testing regime to
validate how the AppImage can be quickly tested.

appimage/10/README.md

@@ -2,7 +2,7 @@ This is an AppImage that runs on all GNU/Linux platforms with:
 
 * FUSE
     * This excludes non-privileged Docker containers unfortunately, unless pre-extracted.
-* GLIBC 2.39+
+* GLIBC 2.38+
 * Cairo 1.18+
 * May require runtime CPU matching Linux ABI x86-64-v3 and newer (CPUs with SSE4.2/AVX2/BMI2/FMA via `lscpu`).
 
@@ -39,6 +39,25 @@ Example startup with command line options:
 ./Magic-x86_64.AppImage -d XR -T scmos
 ```
 
+# FAQ: How to use (inside docker / podman)
+
+```
+chmod +x Magic-x86_64.AppImage
+
+### Podman or Docker, use :Z when rootless with selinux enabled
+podman run --rm --device /dev/fuse --privileged \
+  -v "$(pwd):/tmp/work:Z" -v "/tmp/.X11-unix/X0:/tmp/.X11-unix/X0:Z" \
+  -e DISPLAY -ti almalinux:10
+
+### Inside Docker:
+dnf update -y
+
+dnf install -y fuse libX11 cairo libGL libGLU
+
+cd /tmp/work
+
+./Magic-x86_64.AppImage -d XR -T scmos
+```
 
 # Building Requirements
 

appimage/7/README.md

@@ -39,6 +39,34 @@ Example startup with command line options:
 ./Magic-x86_64.AppImage -d XR -T scmos
 ```
 
+# FAQ: How to use (inside docker / podman)
+
+```
+chmod +x Magic-x86_64.AppImage
+
+### Podman or Docker, use :Z when rootless with selinux enabled
+podman run --rm --device /dev/fuse --privileged \
+  -v "$(pwd):/tmp/work:Z" -v "/tmp/.X11-unix/X0:/tmp/.X11-unix/X0:Z" \
+  -e DISPLAY -ti centos:7
+
+### Inside Docker:
+echo "FIXUP yum from vault and update" \
+  && ls -l /etc/yum.repos.d/ \
+  && cp /etc/yum.repos.d/CentOS-Base.repo /tmp/CentOS-Base.repo.old \
+  && sed -e 's/mirror.centos.org/vault.centos.org/g' -i /etc/yum.repos.d/*.repo  \
+  && sed -e 's/^#.*baseurl=http/baseurl=http/g'      -i /etc/yum.repos.d/*.repo  \
+  && sed -e 's/^mirrorlist=http/#mirrorlist=http/g'  -i /etc/yum.repos.d/*.repo  \
+  && diff -u /tmp/CentOS-Base.repo.old /etc/yum.repos.d/CentOS-Base.repo; \
+  yum clean all \
+  && yum -y update \
+  && rm -f /tmp/CentOS-Base.repo.old
+
+yum install -y fuse libX11 cairo
+
+cd /tmp/work
+
+./Magic-x86_64.AppImage -d XR -T scmos
+```
 
 # Building Requirements
 

appimage/8/README.md

@@ -4,6 +4,7 @@ This is an AppImage that runs on all GNU/Linux platforms with:
     * This excludes non-privileged Docker containers unfortunately, unless pre-extracted.
 * GLIBC 2.28+
 * Cairo 1.15+
+* Supports all Linux x86_64 CPUs
 
 This AppImage build is based on EL8 (via AlmaLinux 8)
 
@@ -38,6 +39,25 @@ Example startup with command line options:
 ./Magic-x86_64.AppImage -d XR -T scmos
 ```
 
+# FAQ: How to use (inside docker / podman)
+
+```
+chmod +x Magic-x86_64.AppImage
+
+### Podman or Docker, use :Z when rootless with selinux enabled
+podman run --rm --device /dev/fuse --privileged \
+  -v "$(pwd):/tmp/work:Z" -v "/tmp/.X11-unix/X0:/tmp/.X11-unix/X0:Z" \
+  -e DISPLAY -ti almalinux:8
+
+### Inside Docker:
+dnf update -y
+
+dnf install -y fuse libX11 cairo libGL libGLU
+
+cd /tmp/work
+
+./Magic-x86_64.AppImage -d XR -T scmos
+```
 
 # Building Requirements
 

appimage/9/README.md

@@ -41,6 +41,25 @@ Example startup with command line options:
 ./Magic-x86_64.AppImage -d XR -T scmos
 ```
 
+# FAQ: How to use (inside docker / podman)
+
+```
+chmod +x Magic-x86_64.AppImage
+
+### Podman or Docker, use :Z when rootless with selinux enabled
+podman run --rm --device /dev/fuse --privileged \
+  -v "$(pwd):/tmp/work:Z" -v "/tmp/.X11-unix/X0:/tmp/.X11-unix/X0:Z" \
+  -e DISPLAY -ti almalinux:9
+
+### Inside Docker:
+dnf update -y
+
+dnf install -y fuse libX11 cairo libGL libGLU
+
+cd /tmp/work
+
+./Magic-x86_64.AppImage -d XR -T scmos
+```
 
 # Building Requirements