Adds git-sync support

Dockerfile

@@ -4,6 +4,9 @@ WORKDIR /outliner
 COPY . /outliner/
 
 RUN gem install bundler && \
-    bundle install
+    bundle install && \
+    apk add --no-cache git && \
+    echo -e "StrictHostKeyChecking no" >> /etc/ssh/ssh_config && \
+    mkdir /root/.ssh
 
 ENTRYPOINT ["/outliner/entrypoint.sh"]

entrypoint.sh

@@ -5,15 +5,50 @@ if [ $# -eq 0 ]; then
   exit
 fi
 
+setup_git() {
+  chmod 0400 /root/.ssh/id_rsa
+
+  if [ -f "$HOME.ssh/id_rsa" ]; then
+    chmod 600 "$HOME.ssh/id_rsa"
+
+    if [ ! -d "$HOME.ssh/id_rsa.pub" ]; then
+      ssh-keygen -y -f "$HOME.ssh/id_rsa" > "$HOME.ssh/id_rsa.pub"
+    fi
+
+    echo "[+] Using SSH key for git pushes"
+  else
+    echo "[E] Git credentials not available, quitting"
+    exit 0
+  fi
+}
+
+update_git_repo() {
+  BRANCH=${GIT_BRANCH:-master}
+  # Clone the branch in a temporary directory
+  tmp_dir=$(mktemp -d)
+  git clone "$GIT_REMOTE_URL" "$tmp_dir"
+  cp -r "$1/*" "$tmp_dir/"
+  cd "$tmp_dir" || exit 1
+  git add .
+  git commit -m "Updates: $(date)"
+  git push origin "$BRANCH"
+}
+
 case $1 in
   export)
     shift
-    bundle exec outliner-export $@
+    bundle exec outliner-export "$@"
+
+    if [ -z "$GIT_REMOTE_URL" ]; then
+      echo "GIT_REMOTE_URL not set"
+    else
+      setup_git
+      update_git_repo "$2"
+    fi
     ;;
   import)
     shift
-    bundle exec outliner-import $@
-    break
+    bundle exec outliner-import "$@"
     ;;
   *)
     echo "Invalid command, please check README"