Update dockerfile to be more explicit on how the packages are installed

Dockerfile

@@ -1,13 +1,22 @@
 FROM rocker/r-base:latest
 
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    libcurl4-openssl-dev \
+    libssl-dev \
+    libxml2-dev \
+    libgit2-dev \
+    libsodium-dev \
+    && rm -rf /var/lib/apt/lists/*
+
 WORKDIR /code
 
-RUN install2.r --error \
-    shiny \
-    ellmer \
-    purrr \
-    readr \
-    dplyr
+# Install R packages
+RUN R -e "install.packages('shiny')" \
+    && R -e "install.packages('purrr')" \
+    && R -e "install.packages('readr')" \
+    && R -e "install.packages('dplyr')" \
+    && R -e "install.packages('ellmer')"
     
 COPY . .