Restore manpages and add more

Tools installed in the devcontainer should come with manuals. Otherwise one needs to consult documentation, which might not align with the version installed in the container.

Author: lurtz

src/s-core-devcontainer/.devcontainer/s-core-local/install.sh

@@ -19,6 +19,9 @@ ARCHITECTURE=$(dpkg --print-architecture)
 
 apt-get update
 
+unminimize -y
+apt-get install -y man-db manpages manpages-dev manpages-posix manpages-posix-dev
+
 # INSTALL CONTAINER BUILD DEPENDENCIES
 # Container build dependencies are not pinned, since they are removed anyway after container creation.
 apt-get install apt-transport-https -y