Switch to Buster

Add python-wheel dependency for mailman-api

Dockerfile

-FROM registry.git.autistici.org/ai3/docker/apache2-base:master
+FROM registry.git.autistici.org/ai3/docker/apache2-base:buster
 
 COPY conf /tmp/conf
 COPY build.sh /tmp/build.sh

build.sh

@@ -6,30 +6,31 @@
 # Packages that are only used to build the site. These will be
 # removed once we're done.
 BUILD_PACKAGES="
-        git
-        rsync
+    git
+    rsync
 "
 
 # Packages required to serve the website and run the services, in
 # addition to those already installed by the base apache2 image.
 PACKAGES="
-	mailman
-	locales
-        python-pip
-        python-setuptools
-        python-flask
-        ai-sso-python
-        findutils
+    mailman
+    locales
+    python-pip
+    python-setuptools
+    python-flask
+    python-wheel
+    ai-sso-python
+    findutils
 "
 
 # Apache modules to enable.
 APACHE_MODULES_ENABLE="
-	cgi
+    cgi
 "
 
 # Sites to enable.
 APACHE_SITES="
-	mailman
+    mailman
 "
 
 # The default bitnami/minideb image defines an 'install_packages'