Update Dockerfile

docker/base/Dockerfile

@@ -1,27 +1,29 @@
-FROM ubuntu:18.04
-RUN yes | apt-get update
-RUN yes | apt-get upgrade
-RUN mkdir /app
+# Use a newer base image (Ubuntu 20.04) and reduce the number of RUN commands.
+FROM ubuntu:20.04
 
-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y locales
+# Update the package index and install system dependencies.
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y \
+    locales \
+    python3 \
+    python3-pip \
+    python3-dev \
+    build-essential \
+    cron
 
+# Configure locales for UTF-8 support.
 RUN sed -i -e 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen && \
     dpkg-reconfigure --frontend=noninteractive locales && \
     update-locale LANG=en_US.UTF-8
 
+# Set the environment variable for UTF-8 locale.
 ENV LANG en_US.UTF-8
-RUN yes | apt-get install python3
-RUN yes | apt-get install python3-pip
-RUN yes | apt-get install cron
-RUN pip3 install -U Flask
-RUN pip3 install -U nltk
-RUN pip3 install -U requests
-RUN pip3 install -U pandas
-RUN pip3 install -U gspread
-RUN pip3 install -U oauth2client
-RUN pip3 install -U datetime
-RUN pip3 install -U pymongo
-RUN pip3 install -U scikit-learn
-RUN pip3 install airtable-python-wrapper
-RUN python3 -mpip install matplotlib
-RUN pip3 install --upgrade gensim
+
+# Install Python packages including Flask and its dependencies.
+RUN pip3 install -U Flask MarkupSafe nltk requests pandas gspread oauth2client datetime pymongo scikit-learn airtable-python-wrapper matplotlib gensim
+
+# Create a directory for your application.
+RUN mkdir /app
+
+# Set the working directory to /app.
+WORKDIR /app