Solve rlang issue

Dockerfile

 FROM ubuntu:18.04
-ARG SOURCE_VERSION=202102
+ARG SOURCE_VERSION=202204
+ARG CRAN_SOURCE=http://cran.irsn.fr/
 MAINTAINER Amine Ghozlane "amine.ghozlane@pasteur.fr"
 ENV TZ=Europe/Paris
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
@@ -45,7 +46,7 @@ RUN wget --no-verbose https://cran.r-project.org/src/base/R-3/R-3.6.1.tar.gz -P
     wget ftp://shiny01.hosting.pasteur.fr/pub/shaman_package_${SOURCE_VERSION}.tar.gz -P /opt && \
     mkdir /opt/packman
 
-RUN R -e """install.packages('devtools', repos='http://cran.irsn.fr/');devtools::install_github('rstudio/packrat');packrat::unbundle('/opt/shaman_package_${SOURCE_VERSION}.tar.gz', '/opt/packman')"""
+RUN R -e """install.packages('devtools', repos='${CRAN_SOURCE}');devtools::install_github('rstudio/packrat');packrat::unbundle('/opt/shaman_package_${SOURCE_VERSION}.tar.gz', '/opt/packman')"""
 
 COPY docker_inst/shiny-server.conf  /etc/shiny-server/shiny-server.conf
 COPY docker_inst/.Rprofile  /srv/shiny-server/

ui.R

@@ -235,13 +235,13 @@ function(request) {
                                     tabPanel("R install with Packrat (linux only)",
                                              p("SHAMAN is available for R=3.6.1. Packrat framework allows an easy installation of all the dependencies. Of note, raw data submission is not possible with this version.",style = "font-family: 'times'; font-si16pt"),
                                              mainPanel(div(style = 'max-width: 900px; word-wrap: break-word;',
-                                                           "# Download packrat package",br(),"wget ftp://shiny01.hosting.pasteur.fr/pub/shaman_package_202102.tar.gz", br(),
+                                                           "# Download packrat package",br(),"wget ftp://shiny01.hosting.pasteur.fr/pub/shaman_package_202204.tar.gz", br(),
                                                            "mkdir packrat/"), width=9,class="mainwell"),
                                              p("Now you can run R:"),
                                              mainPanel(div(style = 'max-width: 900px; word-wrap: break-word;',
                                                            "install.packages(\"devtools\")",br(),
                                                            "devtools::install_github(\"rstudio/packrat\")",br(),
-                                                           "packrat::unbundle(\"shaman_package_202102.tar.gz\", \"packrat/\")", br(),
+                                                           "packrat::unbundle(\"shaman_package_202204.tar.gz\", \"packrat/\")", br(),
                                                            "packrat::init(\"packrat/shaman\")",br(),
                                                            "system(\"Rscript -e 'shiny::runGitHub(\\\"pierreLec/KronaRShy\\\",port=5438)'\",wait=FALSE)",
                                                            br(),"shiny::runGitHub('aghozlane/shaman')"),width=9,class="mainwell")),