Fix Megaplots upper case in Dockerfile

Author: humberto-garciacaballero

Dockerfile

@@ -13,4 +13,4 @@ RUN R -e 'remotes::install_local("/app.tar.gz",upgrade="never")'
 RUN rm /app.tar.gz
 EXPOSE 3838
 USER rstudio
-CMD R -e "options('shiny.port' = 3838, 'shiny.host' = '0.0.0.0');library(megaplots);megaplots::run_app()"
+CMD R -e "options('shiny.port' = 3838, 'shiny.host' = '0.0.0.0');library(Megaplots);Megaplots::run_app()"