Update Dockerfile

Dockerfile

@@ -1,38 +1,33 @@
-# Use the latest Ubuntu image as the base
-FROM ubuntu:latest
-
-# Install necessary packages  
-RUN apt-get update && apt-get install -y \  
-    curl \
-    wget \
-    unzip \
+FROM ubuntu:20.04
+
+# Install dependencies
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    libreadline-dev \
+    zlib1g-dev \
+    libssl-dev \
+    libpq-dev \
     git \
-    python3-pip \
-    libmagic-dev \
-    lsb-release \
-    lsof \
-    postgresql \
-    gnupg
-
-# Install the PostgreSQL 16 repository key
-RUN curl -fsSL https://www.postgresql.org/media/keys/ACCC4CF8.asc | gpg --dearmor -o /etc/apt/trusted.gpg.d/postgresql.gpg
-
-# Install PostgreSQL 16 client and server
-RUN apt-get update && apt-get install -y postgresql-client-16 postgresql-server-dev-16
+    wget \
+    ca-certificates
 
-# Create the foobar user and group
-RUN groupadd -r foobar && useradd -r -g foobar foobar
+# Download and extract PostgreSQL source code
+RUN wget https://ftp.postgresql.org/pub/source/v14.1/postgresql-14.1.tar.gz
+RUN tar -xzf postgresql-14.1.tar.gz
 
-# Create the PostgreSQL data directory and set permissions
-RUN mkdir -p /var/lib/postgresql/data && \
-    chown -R foobar:foobar /var/lib/postgresql/data
+# Configure and build PostgreSQL
+WORKDIR /postgresql-14.1
+RUN ./configure
+RUN make
+RUN make install
 
-# Copy the entrypoint script to the container
-COPY entrypoint.sh /usr/local/bin/
-RUN chmod +x /usr/local/bin/entrypoint.sh
+# Set environment variables
+ENV POSTGRES_DB=mydb
+ENV POSTGRES_USER=myuser
+ENV POSTGRES_PASSWORD=mypassword
 
-# Expose the default PostgreSQL port
+# Expose the PostgreSQL port
 EXPOSE 5432
 
-# Set the ENTRYPOINT to the entrypoint script
-ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
+# Start the PostgreSQL server
+CMD ["postgres", "-D", "/usr/local/pgsql/data"]