Frontend fixes (#267)

* Fix mermaid display

* Move Login/Register buttons on mobile

* Min width on avatar

Dockerfile

@@ -33,6 +33,8 @@ FROM base AS dev
 EXPOSE 6157 2222 16157
 VOLUME /opengist
 
+RUN git config --global --add safe.directory /opengist
+
 CMD ["make", "watch"]