Update Dockerfile

Author: ManjulaChintharla

.devcontainer/Dockerfile

@@ -2,7 +2,16 @@ ARG IMAGE=bullseye
 FROM mcr.microsoft.com/devcontainers/${IMAGE}
 
 ENV PYTHONUNBUFFERED 1
+ENV DEBIAN_FRONTEND=noninteractive
 
-RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
-    && apt-get -y install --no-install-recommends postgresql-client \
-     && apt-get clean -y && rm -rf /var/lib/apt/lists/*
+# Add the PostgreSQL Apt Repository
+RUN apt-get update && \
+    apt-get install -y wget gnupg2 && \
+    echo "deb http://apt.postgresql.org/pub/repos/apt bullseye-pgdg main" > /etc/apt/sources.list.d/pgdg.list && \
+    wget -qO - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - && \
+    apt-get update && \
+    apt-get -y install --no-install-recommends \
+        postgresql-client \
+        postgresql-server-dev-14 && \
+    apt-get clean -y && \
+    rm -rf /var/lib/apt/lists/*