Add MongoDB install and start commands

Dockerfile

@@ -7,11 +7,55 @@ WORKDIR /app
 COPY ./requirements.txt requirements.txt
 RUN pip install --no-cache-dir --upgrade -r requirements.txt
 
-RUN cat /etc/os-release
+RUN apt-get update && apt-get install -y \
+    curl \
+    ca-certificates \
+    cron \
+    tar \
+    gzip \
+    procps \
+    && rm -rf /var/lib/apt/lists/*
+
+ARG MONGO_VERSION=8.0.19
+ARG MONGO_TARBALL_URL=https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-ubuntu2404-${MONGO_VERSION}.tgz
+
+RUN curl -fsSL "${MONGO_TARBALL_URL}" -o /tmp/mongodb.tgz \
+    && tar -xzf /tmp/mongodb.tgz -C /opt \
+    && ln -s /opt/mongodb-linux-x86_64-ubuntu2404-${MONGO_VERSION} /opt/mongodb \
+    && ln -s /opt/mongodb/bin/mongod /usr/local/bin/mongod \
+    && ln -s /opt/mongodb/bin/mongos /usr/local/bin/mongos \
+    && rm /tmp/mongodb.tgz
+
+RUN mongod --version
+
+# Check that MongoDB is installed & works properly
+RUN mkdir -p /tmp/mongo-data-build /tmp/mongo-logs-build /tmp/mongo-run-build \
+    && mongod --bind_ip 127.0.0.1 \
+       --dbpath /tmp/mongo-data-build \
+       --logpath /tmp/mongo-logs-build/mongod.log \
+       --pidfilepath /tmp/mongo-run-build/mongod.pid \
+       --fork \
+    && sleep 3 \
+    && python -c "from pymongo import MongoClient; c = MongoClient('mongodb://127.0.0.1:27017/', serverSelectionTimeoutMS=5000); print(c.admin.command('ping'))" \
+    && kill "$(cat /tmp/mongo-run-build/mongod.pid)" \
+    && sleep 2
 
 COPY --chown=user . /app
 
 USER user
 
+ENTRYPOINT ["/bin/bash", "-lc", "\
+mkdir -p /tmp/mongo-data /tmp/mongo-logs /tmp/mongo-run && \
+rm -f /tmp/mongo-run/mongod.pid && \
+mongod --bind_ip 127.0.0.1 \
+       --dbpath /tmp/mongo-data \
+       --logpath /tmp/mongo-logs/mongod.log \
+       --pidfilepath /tmp/mongo-run/mongod.pid \
+       --logappend \
+       --fork && \
+sleep 3 && \
+python -c \"from pymongo import MongoClient; c = MongoClient('mongodb://127.0.0.1:27017/', serverSelectionTimeoutMS=5000); print(c.admin.command('ping'))\" && \
+exec \"$@\"", "--"]
+
 CMD ["gunicorn", "-k", "geventwebsocket.gunicorn.workers.GeventWebSocketWorker", "-w", "1", "--bind", "0.0.0.0:7860", "chat_application.main:app"]