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API.R

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+library(plumber)
+
+#* @apiTitle Cars Model App
+
+#* @param cyl number of cylinders,
+#* @param disp displacement
+#* @param hp horse-power
+#* @param drat drat
+#* @param wt weight
+#* @param qsec qsec
+#* @param vs vs
+#* @param am am
+#* @param gear number of gear level
+#* @param carb carbonmono-oxide emission
+#* @post /predict
+function(cyl,disp,hp,drat,wt,qsec,vs,am,gear,carb){
+  
+  new_data <- data.frame(
+    cyl = as.numeric(cyl),
+    disp = as.numeric(disp),
+    hp = as.numeric(hp),
+    drat = as.numeric(drat),
+    wt = as.numeric(wt),
+    qsec = as.numeric(qsec),
+    vs = as.numeric(vs),
+    am = as.numeric(am),
+    gear = as.numeric(gear),
+    carb = as.numeric(carb)
+  )
+  
+  model <- readRDS("lm_model")
+  
+  response = predict(model,new_data)
+  
+  return(response)
+  
+}

Dockerfile

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+# Use the official R image as the base image
+FROM rocker/r-base:4.3.0
+
+# Install system dependencies including libsodium
+RUN apt-get update && apt-get install -y \
+    libcurl4-openssl-dev \
+    libssl-dev \
+    libxml2-dev \
+    libgit2-dev \
+    libsodium-dev \  
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+	
+# Install plumber dependencies manually
+RUN R -e "install.packages(c('stringi', 'jsonlite', 'webutils', 'httpuv', 'promises'), repos='https://cloud.r-project.org/')"
+
+# Install plumber package
+RUN R -e "install.packages('plumber', repos='https://cloud.r-project.org/')"
+
+# Set the working directory
+WORKDIR /app
+
+# Copy the API and Server scripts into the container
+COPY . /app
+
+# Expose the port that the API will run on
+EXPOSE 8080
+
+# CMD to run the Server script
+CMD ["Rscript", "Server.R"]

Server.R

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+library(plumber)
+
+pr("API.R") |> 
+  pr_run(host = "0.0.0.0",port = 8080)

dockerignore.txt

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+.Rproj.user
+.Rhistory
+.RData
+.Ruserdata
+*.Rproj
+.git
+.gitignore
+*.log
+data/raw