So many changes sorry.

A. Two new environment vars:
1. WEB_ROOT
the web server will serve from / (/var/www/html) or a deeper directory

2. ARCH
if you only want to mirror amd64 you can use deb-amd64 instead of deb

B. Setup clean.sh to work from postmirror.sh. If postmirror.sh already
exists it is not touched. postmirror.sh can also be
edited to add other commands. It's in /var/www/html/var << this is the
way that apt-mirror works

C. Other little changes.

Dockerfile

@@ -2,25 +2,27 @@ FROM ubuntu:18.04
 
 RUN \
   apt update && \
-  apt install -y apt-mirror apache2 && \
+  apt install -y apt-mirror apache2 rsync && \
   apt autoremove -y && apt clean
 
 ENV DEBIAN_FRONTEND noninteractive
 ENV TIMEOUT 12h
+ENV WEB_ROOT /
 ENV MIRROR_URL http://archive.ubuntu.com/ubuntu
 ENV DIST1 bionic
-ENV DIST2 focal
+ENV DIST2 ""
 ENV DIST3 ""
 ENV NTHREADS 10
+ENV ARCH deb
 ENV PUID 1000
 ENV PGID 1000
 
-RUN mkdir -p /var/www/html/ubuntu
-
 RUN rm -f /var/run/apache2/apache2.pid
+
 EXPOSE 80
 
 COPY setup.sh /setup.sh
 
 VOLUME ["/var/www/html/"]
+
 CMD ["/bin/bash", "setup.sh"]

setup.sh

@@ -3,39 +3,39 @@
 TARGETFILE="/etc/apt/mirror.list"
 
 echo "configuring [$TARGETFILE] MIRROR_URL=[$MIRROR_URL]"
-echo "  DIST1=[$DIST1] DIST2=[$DIST2]"
+echo "  DIST1=[$DIST1] DIST2=[$DIST2] DIST3=[$DIST3]"
 
 echo "#### config ####
-set base_path /var/www/html/ubuntu
+set base_path /var/www/html/
 set nthreads $NTHREADS
 set _tilde 0" \
 > "$TARGETFILE"
 
 if [[ ! -z "$DIST1" ]]; then
 echo "# for release $DIST1
-deb $MIRROR_URL $DIST1 main restricted universe multiverse
+$ARCH $MIRROR_URL $DIST1 main restricted universe multiverse
-deb $MIRROR_URL $DIST1-updates main restricted universe multiverse
+$ARCH $MIRROR_URL $DIST1-updates main restricted universe multiverse
-deb $MIRROR_URL $DIST1-backports main restricted universe multiverse
+$ARCH $MIRROR_URL $DIST1-backports main restricted universe multiverse
-deb $MIRROR_URL $DIST1-security main restricted universe multiverse
+$ARCH $MIRROR_URL $DIST1-security main restricted universe multiverse
-deb $MIRROR_URL $DIST1-proposed main restricted universe multiverse" >> "$TARGETFILE"
+$ARCH $MIRROR_URL $DIST1-proposed main restricted universe multiverse" >> "$TARGETFILE"
 fi
 
 if [[ ! -z "$DIST2" ]]; then
 echo "# for release $DIST2
-deb $MIRROR_URL $DIST2 main restricted universe multiverse
+$ARCH $MIRROR_URL $DIST2 main restricted universe multiverse
-deb $MIRROR_URL $DIST2-updates main restricted universe multiverse
+$ARCH $MIRROR_URL $DIST2-updates main restricted universe multiverse
-deb $MIRROR_URL $DIST2-backports main restricted universe multiverse
+$ARCH $MIRROR_URL $DIST2-backports main restricted universe multiverse
-deb $MIRROR_URL $DIST2-security main restricted universe multiverse
+$ARCH $MIRROR_URL $DIST2-security main restricted universe multiverse
-deb $MIRROR_URL $DIST2-proposed main restricted universe multiverse" >> "$TARGETFILE"
+$ARCH $MIRROR_URL $DIST2-proposed main restricted universe multiverse" >> "$TARGETFILE"
 fi
 
 if [[ ! -z "$DIST3" ]]; then
 echo "# for release $DIST3
-deb $MIRROR_URL $DIST3 main restricted universe multiverse
+$ARCH $MIRROR_URL $DIST3 main restricted universe multiverse
-deb $MIRROR_URL $DIST3-updates main restricted universe multiverse
+$ARCH $MIRROR_URL $DIST3-updates main restricted universe multiverse
-deb $MIRROR_URL $DIST3-backports main restricted universe multiverse
+$ARCH $MIRROR_URL $DIST3-backports main restricted universe multiverse
-deb $MIRROR_URL $DIST3-security main restricted universe multiverse
+$ARCH $MIRROR_URL $DIST3-security main restricted universe multiverse
-deb $MIRROR_URL $DIST3-proposed main restricted universe multiverse" >> "$TARGETFILE"
+$ARCH $MIRROR_URL $DIST3-proposed main restricted universe multiverse" >> "$TARGETFILE"
 fi
 
 echo "# for EXTRAS
@@ -45,22 +45,59 @@ $EXTRA3
 $EXTRA4
 $EXTRA5
 
-#clean http://archive.ubuntu.com/ubuntu" >> "$TARGETFILE"
+clean $MIRROR_URL" >> "$TARGETFILE"
 
 echo "content of [$TARGETFILE] is..."
 echo "-------------------------------------"
-cat "$TARGETFILE"
+cat "$TARGETFILE" |sed -E "s~^(.*)$~>>> \1~g"
 echo "-------------------------------------"
 
+echo
+
 rm -f /var/run/apache2/apache2.pid
 
-echo "hacking www-data to become PUID=$PUID PGID=$PGID"
+echo "hacking www-data and apt-mirror to become PUID=$PUID PGID=$PGID"
-SEDEX="s/www-data:x:[0-9]+:[0-9]+:/www-data:x:${PUID}:${PGID}:/g"
+SEDEX="s~(www-data|apt-mirror):x:[0-9]+:[0-9]+:~\1:x:${PUID}:${PGID}:~g"
-echo "sed /etc/passwd with [$SEDEX]"
+sed -ri "$SEDEX" /etc/passwd
-cat /etc/passwd | \
+echo "regex: $SEDEX"
-sed -E $SEDEX > /tmp/passy
+echo "-------------------------------------"
-cp /tmp/passy /etc/passwd
+grep -E '(www-data|apt-mirror)' /etc/passwd |sed -E "s~^(.*)$~>>> \1~g"
-rm /tmp/passy
+echo "-------------------------------------"
+
+echo
+
+echo "adding server name"
+echo $'\nServerName apt-mirror' >> /etc/apache2/apache2.conf
+echo "-------------------------------------"
+grep -E 'ServerName' /etc/apache2/apache2.conf |sed -E "s~^(.*)$~>>> \1~g"
+echo "-------------------------------------"
+
+echo
+
+echo "changing default site document root to $WEB_ROOT"
+SEDEX="s~DocumentRoot\s+\/var\/www\/html\s*$~DocumentRoot \/var\/www\/html${WEB_ROOT}~"
+sed -Ei "$SEDEX" /etc/apache2/sites-available/000-default.conf
+echo "regex: $SEDEX"
+echo "-------------------------------------"
+grep -E 'DocumentRoot' /etc/apache2/sites-available/000-default.conf |sed -E "s~^(.*)$~>>> \1~g"
+echo "-------------------------------------"
+
+echo
+
+echo "if no postmirror.sh then create and set to call clean.sh"
+mkdir -p /var/www/html/var;
+if [[ ! -f /var/www/html/var/postmirror.sh ]]; then
+  echo $'#!/bin/bash\ncd "${0%/*}"\necho "$(pwd)/clean.sh"\nsleep 5\n$(pwd)/clean.sh\n' > /var/www/html/var/postmirror.sh; fi
+echo "-------------------------------------"
+cat /var/www/html/var/postmirror.sh |sed -E "s~^(.*)$~>>> \1~g"
+echo "-------------------------------------"
+
+echo
+
+echo "Changing ownership of all files on /var/www/html to apt-mirror"
+chown -R apt-mirror:apt-mirror /var/www/html
+
+echo
 
 echo "starting apache server"
 service apache2 start
@@ -70,6 +107,7 @@ echo "TIMEOUT is ${TIMEOUT}"
 while true; do
     echo "[$(date)] Starting apt-mirror"
     apt-mirror
+    #sleep 60
     echo "[$(date)] Completed"
     echo "[$(date)] Sleeping $TIMEOUT to execute apt-mirror again ======"
     sleep "$TIMEOUT"