Use IPv4, no curl

alpine/Dockerfile

@@ -3,9 +3,7 @@ FROM pandoc/core:3.1.13-alpine as alpine-latex
 
 # NOTE: to maintainers, please keep this listing alphabetical.
 RUN apk --no-cache add \
-        bind-tools \
         ca-certificates \
-        curl \
         fontconfig \
         freetype \
         gnupg \

common/latex/install-texlive.sh

@@ -19,7 +19,7 @@ if [ "$tlversion" = "$default_version" ]; then
     # always use the mirror URL, we'd run into problems whenever we get
     # installer and signatures from different mirrors that are not 100%
     # in sync.
-    installer_url=$(wget --quiet --output-document=/dev/null \
+    installer_url=$(wget -4 --quiet --output-document=/dev/null \
                          --server-response \
                          http://mirror.ctan.org/systems/texlive/tlnet/ \
                          2>&1 | \
@@ -32,10 +32,6 @@ ftp://tug.org/historic/systems/texlive/$tlversion/tlnet-final/"
 ftp://tug.org/historic/systems/texlive/$tlversion/tlnet-final"
 fi
 
-if [ -z "${installer_url}" ]; then
-    installer_url=$(curl -L -o /dev/null -w '%{url_effective}' https://mirror.ctan.org/systems/texlive/tlnet/)
-fi
-
 # Log the installer and repository url
 printf 'installer URL: %s\n' "${installer_url}"
 printf 'repository: %s\n' "${repository}"