touch up alpine bootstrapping process

wiki/unix/alpine.m4

@@ -3,17 +3,44 @@ _header(`Alpine')
 Alpine Linux is a small Linux distribution based on musl libc.
 Its main purpose is to serve as a server distribution, however many have found use for it as a desktop distribution.
 </P>
+
+_subheader(`apk(8)')
 _bibliography(`
+_bentr(`_link(`Alpine Package Keeper', `https://wiki.alpinelinux.org/wiki/Alpine_Package_Keeper') (Alpine Wiki)')
 _bentr(`<A HREF="https://pkgs.alpinelinux.org/contents">Alpine repositories content search</A>')
 ')
-_subheader(`_code(`WARNING: Ignoring [_italic(`path')]: UNTRUSTED signature')')
+_subsubheader(`Repositories')
+<P>
+See _man(`apk-repositories(5)').
+</P>
+<P>
+Most Internet repositories use the URL scheme of _code(`https://[_italic(`server')]/alpine/[_italic(`release branch')]/[_italic(`repository branch')]').
+For example, the _italic(`main') repository branch on the _italic(`edge') release branch on the server _italic(`dl-cdn.alpinelinux.org') is _code(`http://dl-cdn.alpinelinux.org/alpine/edge/main').
+A repositories file could look like the following:
+</P>
+<PRE>
+http://dl-cdn.alpinelinux.org/alpine/edge/main
+http://dl-cdn.alpinelinux.org/alpine/edge/community
+http://dl-cdn.alpinelinux.org/alpine/edge/testing
+</PRE>
+<P>
+Local directories like _file(`/media/cdrom/apks'), an example from the Alpine Wiki, are valid as well.
+</P>
+_subsubheader(`_code(`WARNING: Ignoring [_italic(`path')]: UNTRUSTED signature')')
 _bibliography(`
-_bentr(_link(`ERROR: http://dl-4.alpinelinux.org/alpine/edge/testing: UNTRUSTED signature', `https://stackoverflow.com/questions/73374745/error-http-dl-4-alpinelinux-org-alpine-edge-testing-untrusted-signature')')
+_bentr(`_link(`ERROR: http://dl-4.alpinelinux.org/alpine/edge/testing: UNTRUSTED signature', `https://stackoverflow.com/questions/73374745/error-http-dl-4-alpinelinux-org-alpine-edge-testing-untrusted-signature')')
 ')
 <P>
 If you are absolutely sure what you're doing is fine, _command(`apk [_italic(`command')] _em(`--allow-untrusted')').
 This ignores the error and allows the operation to proceed.
 </P>
+
+_subheader(`Always install manual pages')
+<P>
+Alpine doesn't include man pages in program packages to save on space, instead keeping them in _code(`[<I>package</I>]-doc') sibling packages.
+To always install doc packages with program packages, _code(`apk add docs').
+</P>
+
 _subheader(`Bootstrapping')
 <P>
 Alpine's bootstrapping procedure is quite manual; you should probably use _program(`setup-alpine').
@@ -22,13 +49,7 @@ However, it is possible and quite easy to perform the steps manually.
 <OL>
 <LI>Copy over the contents of _file(`/etc/apk/keys') to _file(`/mnt/etc/apk/keys')</LI>
 <LI>
-Add newline-delimited mirrors to _file(`/mnt/etc/apk/repositories'), such as these if you wish to use the _code(`edge') branch:
-<PRE>
-http://dl-cdn.alpinelinux.org/alpine/edge/main
-http://dl-cdn.alpinelinux.org/alpine/edge/community
-http://dl-cdn.alpinelinux.org/alpine/edge/testing
-</PRE>
-_code(`edge') may be replaced with a stable branch, the latest being _code(`v3.17') as of writing.
+Fill out _man(`apk-repositories(5)') on the mount.
 </LI>
 <LI>
 Run _command(`apk --root /mnt add --initdb alpine-base').
@@ -36,18 +57,9 @@ This is an ordinary _man(`apk-add(8)') call; you may wish to install necessities
 </LI>
 </OL>
 <P>
-Alpine does not have a _man(`chroot(1)') helper; you must manually do that with a one-liner such as
-_code(`for i in dev proc sys; do mount -o bind "/$i" "/mnt/$i"; done; cp /etc/resolv.conf /mnt/etc/resolv.conf')
-which you can chroot into.
-</P>
-<P>
-After chrooting in, you must configure basics such as users, passwords, _man(`fstab(5)'), and the bootloader yourself.
-</P>
-
-_subheader(`Always install manual pages')
-<P>
-Alpine doesn't include man pages in program packages to save on space, instead keeping them in _code(`[<I>package</I>]-doc') sibling packages.
-To always install doc packages with program packages, _code(`apk add docs').
+Make sure to bind mount (_command(`mount -o bind')) _file(`/dev/'), _file(`/proc/'), and _file(`/sys/') to the corresponding locations on the bootstrap prefix
+and copy _file(`/etc/resolv.conf') over before _ref(`#posix#chroot(1)')ing into the bootstrap directory and finalizing setup.
+Remember to set up users, _ref(`#fstab(5)'), and the bootloader if necessary.
 </P>
 
 _subheader(`postmarketOS')

wiki/unix/fstab.m4

@@ -1,4 +1,3 @@
-_header(`fstab')
-<P>See _man(`fstab(5)').</P>
+_header(`fstab(5)')
 <P>postmarketOS requires that the _code(`localmount') OpenRC service be enabled for the system to read _man(`fstab(5)').
 <P>Arch and Artix have fstab generators at _man(`genfstab(8)') and _man(`fstabgen(8)') respectively in their installation scripts.</P>