Alertmanager web UI is broken after installing using generate-ui.sh about alertmanager HOT 3 CLOSED

#!/bin/bash

set -euo pipefail

ELMDISTURL=https://github.com/elm/compiler/releases/download/0.19.1/binary-for-linux-64-bit.gz
DATEPICKER_CSS_URL=https://raw.githubusercontent.com/elm-community/elm-datepicker/master/css/elm-datepicker.css
BOOTSTRAP_URL=https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css
SRCDIR=/usr/share/gocode/src/github.com/prometheus/alertmanager/ui/app
DSTDIR=/usr/share/prometheus/alertmanager/ui

echo "Installing dependencies..." >&2
apt update
apt install -yy curl uglifyjs git \
    golang-github-prometheus-alertmanager-dev

#/usr/share/fonts-font-awesome/
TMPDIR=$(mktemp -d)


echo "Downloading Elm tools..." >&2
curl --location $ELMDISTURL | gunzip -c - > $TMPDIR/elm
chmod +x $TMPDIR/elm

echo "Compiling source code..." >&2
ln -s $SRCDIR/src $SRCDIR/elm.json $TMPDIR
(cd $TMPDIR; ./elm make src/Main.elm --optimize --output $TMPDIR/app.js)

echo "Optimising source code..." >&2
uglifyjs $TMPDIR/app.js \
    --compress 'pure_funcs="F2,F3,F4,F5,F6,F7,F8,F9,A2,A3,A4,A5,A6,A7,A8,A9",pure_getters,keep_fargs=false,unsafe_comps,unsafe' \
    --mangle --output $TMPDIR/script.js

echo "Installing in Alertmanager directory..." >&2
mkdir -p $DSTDIR
cp $TMPDIR/script.js $DSTDIR
cp $SRCDIR/index.html $SRCDIR/favicon.ico $DSTDIR

rm -rf $TMPDIR

# Step 1: Clone the repository
echo "Cloning Alertmanager repository..."
git clone https://github.com/prometheus/alertmanager /tmp/alertmanager_repo
sleep 1

# Step 2: Backup script.js, delete other files inside /usr/share/prometheus/alertmanager/ui/
echo "Backing up script.js and deleting other files inside /usr/share/prometheus/alertmanager/ui/..."
mv /usr/share/prometheus/alertmanager/ui/script.js /tmp
rm -rf /usr/share/prometheus/alertmanager/ui/*
sleep 1

# Step 3: Move content of cloned repository to /usr/share/prometheus/alertmanager/ui/
echo "Moving contents of cloned repository to /usr/share/prometheus/alertmanager/ui/..."
mv /tmp/alertmanager_repo/ui/app/* /usr/share/prometheus/alertmanager/ui/
sleep 1

# Step 4: Move script.js back to /usr/share/prometheus/alertmanager/ui/
echo "Moving script.js back to /usr/share/prometheus/alertmanager/ui/..."
mv /tmp/script.js /usr/share/prometheus/alertmanager/ui/
sleep 1

# Step 5: Rename bootstrap-4.0.0-alpha.6-dist to bootstrap
echo "Renaming bootstrap-4.0.0-alpha.6-dist to bootstrap..."
mv /usr/share/prometheus/alertmanager/ui/lib/bootstrap-4.0.0-alpha.6-dist /usr/share/prometheus/alertmanager/ui/lib/bootstrap
sleep 1

# Step 6: Rename font-awesome-4.7.0 to font-awesome
echo "Renaming font-awesome-4.7.0 to font-awesome..."
mv /usr/share/prometheus/alertmanager/ui/lib/font-awesome-4.7.0 /usr/share/prometheus/alertmanager/ui/lib/font-awesome
sleep 1

echo "Deleting repo as its no longer needed"
rm -rf /tmp/alertmanager_repo

echo "Alertmanager restart required. Other than that, if you haven't seen any error above, the installation is completed!"

echo "Alertmanager updated successfully!"