Add appli entry-point to new dockerfile

docker/Dockerfile.oasisui_appli

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+FROM rocker/r-ver:4.0.5
+FROM rocker/r-ver:4.0.5
+# -> ubuntu 20.04
+# -> don't use latest R release, since that will keep getting linked with later build-dates and RStudio packagemanager
+# -> sets repository to RStudio packagemanager for specific build date of R version, being 2021-05-17 for R 4.0.5
+# (see https://github.com/rocker-org/rocker-versioned2/blob/master/dockerfiles/r-ver_4.0.5.Dockerfile for reference)
+# -> installs R to /usr/local/lib/R
+
+RUN apt-get update && apt-get upgrade -y && \
+apt-get install -y --no-install-recommends libnode-dev libcairo2-dev libxt-dev libcurl4-gnutls-dev libssl-dev libssh2-1-dev libxml2-dev apt-utils libjq-dev gdal-bin proj-bin libgdal-dev libudunits2-dev && \
+    # if desired, add tools such as: sudo, vim, wget, curl, procps
+    # library necessary for dependency of geojsonio
+    apt-get install -y libprotobuf-dev protobuf-compiler  && \
+    apt-get install -y tzdata && \
+    rm -rf /var/lib/apt/lists/*
+
+# libcairo2-dev and libxt-dev needed for Cairo, e.g. graphics
+# libcurl4-openssl-dev and libcurl4-gnutls-dev are mutually exclusive. we choose GNU TLS, which seems preferred on Ubuntu / Debian systems and is recommended e.g. by RStudio
+# libssl-dev depends on libssl1.1, which in turn depends on libc6
+# (libcurl4-openssl-dev / openssl would depend on libc6 and libssl1.1 as well)
+
+# Install Oasisui with dependencies
+ARG REF_BRANCH
+ENV REF_BRANCH=${REF_BRANCH:-master}
+RUN R -e "install.packages('remotes')" && \
+    # installing older version of package shinyjs from GitHub
+    R -e "remotes::install_github('daattali/shinyjs', ref = 'v1.1', upgrade = 'always')" && \
+    R -e "remotes::install_github('OasisLMF/OasisUI', ref = '${REF_BRANCH}', subdir = 'BFE_RShiny/oasisui')" && \
+    rm -rf /var/lib/apt/lists/*
+
+# Create the logging directory
+RUN mkdir /var/log/shiny-server
+
+# Make root directory
+RUN mkdir -p /root
+WORKDIR /root
+
+# Add shiny options upon startup
+COPY shinyproxy/Rprofile.site /usr/local/lib/R/etc/
+
+# Set port
+EXPOSE 3838
+
+# Use below for stand-alone build, i.e. without shinyproxy
+# ARG API_IP_CMD_RES
+# ENV API_IP=${API_IP_CMD_RES:-0.0.0.0}
+# ENV API_PORT=8000
+# ENV API_VERSION=v1
+# ENV API_SHARE_FILEPATH=./downloads
+# ENV OASIS_ENVIRONMENT=oasis_localhost
+# ENV MAX_UPLOAD_SIZE=500
+# ENV HIDE_FOOTER_VERSION=TRUE
+
+# Launch Oasisui
+CMD ["R", "-e", "oasisui::runOasisui(mode="appli")"]