[FIX] Odoo 11.0-12.0: add asian fonts and rtlcss

When printing a report, the asian fonts were missing.
Also, since Odoo 12.0, rtlcss is needed to support the right-to-left languages
in the Odoo UI.

With this commit, the noto-cjk fonts are added as well as the nodejs rtlcss tool.

11.0/Dockerfile

@@ -10,6 +10,7 @@ RUN set -x; \
         && apt-get install -y --no-install-recommends \
             ca-certificates \
             curl \
+            fonts-noto-cjk \
             gnupg \
             libssl1.0-dev \
             node-less \

12.0/Dockerfile

@@ -10,6 +10,7 @@ RUN set -x; \
         && apt-get install -y --no-install-recommends \
             ca-certificates \
             curl \
+            fonts-noto-cjk \
             gnupg \
             libssl1.0-dev \
             node-less \
@@ -34,6 +35,14 @@ RUN set -x; \
         && apt-get update  \
         && apt-get install -y postgresql-client
 
+# Install rtlcss (on Debian stretch)
+RUN set -x;\
+    curl -sSL https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add - \
+    && echo "deb http://deb.nodesource.com/node_8.x stretch main" > /etc/apt/sources.list.d/nodesource.list \
+    && apt-get update \
+    && apt-get install -y nodejs \
+    && npm install -g rtlcss
+
 # Install Odoo
 ENV ODOO_VERSION 12.0
 ENV ODOO_RELEASE 20181126