add asciidoctor and pandoc

Dockerfile

@@ -1,7 +1,7 @@
 FROM cloudron/base:3.0.0@sha256:455c70428723e3a823198c57472785437eb6eab082e79b3ff04ea584faf46e92
 
 RUN apt-get update && \
-    apt-get install -y openssh-server git && \
+    apt-get install -y openssh-server git asciidoctor pandoc && \
     rm -rf /etc/ssh_host_* && \
     rm -r /var/cache/apt /var/lib/apt/lists
 RUN pip3 install jupyter

app.ini.template

@@ -103,6 +103,19 @@ COOKIE_SECURE = true
 COOKIE_NAME = cloudron_gitea
 GC_INTERVAL_TIME = 2592000
 
+[markup.asciidoc]
+ENABLED = true
+FILE_EXTENSIONS = .adoc,.asciidoc
+RENDER_COMMAND = "asciidoctor -s -a showtitle --out-file=- -"
+; Input is not a standard input but a file
+IS_INPUT_FILE = false
+
+[markup.restructuredtext]
+ENABLED = true
+FILE_EXTENSIONS = .rst
+RENDER_COMMAND = "timeout 30s pandoc +RTS -M512M -RTS -f rst"
+IS_INPUT_FILE = false
+
 [markup.jupyter]
 ENABLED = true
 FILE_EXTENSIONS = .ipynb