Add libolm-dev and build dependencies

Dockerfile.cloudron

@@ -8,6 +8,9 @@ RUN apt-get update && apt-get install -y \
     bash \
     jq \
     yq \
+    git \
+    build-essential \
+    libolm-dev \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*