fix: mount SSH keys and host repos for git push, install openssh-client

Dockerfile

@@ -1,6 +1,6 @@
 FROM python:3.12-slim
 WORKDIR /app
-RUN apt-get update && apt-get install -y --no-install-recommends git && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y --no-install-recommends git openssh-client && rm -rf /var/lib/apt/lists/*
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 COPY main.py .

compose/docker-compose.yml

@@ -6,9 +6,11 @@ services:
     volumes:
       - /opt/src/betterlifesg:/repo/betterlifesg:rw
       - /opt/src/hk_memoraiz:/repo/memoraiz:rw
+      - /root/.ssh:/root/.ssh:ro
     env_file:
       - .env
     environment:
       - TZ=${TZ:-Asia/Singapore}
       - SITE_DIR=/repo/betterlifesg/site
       - MEMORAIZ_DIR=/repo/memoraiz/frontend
+      - GIT_SSH_COMMAND=ssh -o StrictHostKeyChecking=no