bump go modules, make auth dev hostname customisable

After this commit, dev auth would start working with the `REMARK_URL`
hostname instead of the previously hardcoded 127.0.0.1.

Breaks development setup where `REMARK_URL` was set
to a non-standard value and dev auth was running on 127.0.0.1
and working, as, after that change, it would stop working.

compose-dev-frontend.yml

@@ -31,11 +31,13 @@ services:
       - "8084:8084" # local oauth2 server
 
     environment:
+      # REMARK_URL below would be used for the dev auth,
+      # so that it would work on http://127.0.0.1 but wouldn't on http://localhost
       - REMARK_URL=http://127.0.0.1:8080
       - SECRET=12345
       - DEBUG=true
       - ADMIN_PASSWD=password
-      - AUTH_DEV=true # activate local oauth "dev"
+      - AUTH_DEV=true # activate local OAuth "dev" on REMARK_URL hostname
       - ADMIN_SHARED_ID=dev_user # set admin flag for default user on local oauth2
       - AUTH_ANON=true
       - AUTH_EMAIL_ENABLE=true