Fix repo url.

Dockerfile

@@ -200,7 +200,7 @@ RUN \
     gosu wekan:wekan git clone --depth 1 -b master git://github.com/wekan/wekan-ldap.git && \
     gosu wekan:wekan git clone --depth 1 -b master git://github.com/wekan/wekan-scrollbar.git && \
     gosu wekan:wekan git clone --depth 1 -b master git://github.com/wekan/meteor-accounts-oidc.git && \
-    gosu wekan:wekan git clone --depth 1 -b master --recurse-submodules git://github.com/wekan/markdown.git && \
+    gosu wekan:wekan git clone --depth 1 -b master --recurse-submodules https://github.com/wekan/markdown.git && \
     gosu wekan:wekan mv meteor-accounts-oidc/packages/switch_accounts-oidc wekan-accounts-oidc && \
     gosu wekan:wekan mv meteor-accounts-oidc/packages/switch_oidc wekan-oidc && \
     gosu wekan:wekan rm -rf meteor-accounts-oidc && \