Add more deps to docker image

Dockerfile

@@ -1,9 +1,9 @@
-FROM node:10 AS frontend-builder
+FROM node:12 AS frontend-builder
 
 COPY ./maubot/management/frontend /frontend
 RUN cd /frontend && yarn --prod && yarn build
 
-FROM alpine:3.9
+FROM alpine:edge
 
 ENV UID=1337 \
     GID=1337
@@ -11,7 +11,7 @@ ENV UID=1337 \
 COPY . /opt/maubot
 COPY --from=frontend-builder /frontend/build /opt/maubot/frontend
 WORKDIR /opt/maubot
-RUN apk add --no-cache \
+RUN apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/testing \
       py3-aiohttp \
       py3-sqlalchemy \
       py3-attrs \
@@ -24,7 +24,13 @@ RUN apk add --no-cache \
       py3-pillow \
       py3-magic \
       py3-psycopg2 \
- && pip3 install -r requirements.txt feedparser dateparser
+      py3-matplotlib \
+      py3-ruamel.yaml \
+      py3-jinja2 \
+      py3-click \
+      py3-packaging \
+      py3-markdown \
+      && pip3 install -r requirements.txt feedparser dateparser langdetect
 # TODO remove pillow, magic and feedparser when maubot supports installing dependencies
 
 VOLUME /data