feat: add comprehensive GitHub workflow and development tools

deploy-production/server-setup.sh

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+#!/bin/bash
+# Server Setup Script for Ubuntu 22.04
+# Run as root: bash server-setup.sh
+
+echo "=== Installing Docker and Docker Compose ==="
+apt update
+apt install -y ca-certificates curl gnupg lsb-release
+
+# Add Docker's official GPG key
+mkdir -p /etc/apt/keyrings
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+
+# Set up Docker repository
+echo \
+  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
+  $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
+
+apt update
+apt install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin
+
+# Start and enable Docker
+systemctl start docker
+systemctl enable docker
+
+echo "=== Installing Additional Tools ==="
+apt install -y git nginx certbot python3-certbot-nginx ufw htop
+
+echo "=== Setting up Firewall ==="
+ufw default deny incoming
+ufw default allow outgoing
+ufw allow ssh
+ufw allow 80
+ufw allow 443
+ufw --force enable
+
+echo "=== Creating Application User ==="
+useradd -m -s /bin/bash stiftung
+usermod -aG docker stiftung
+
+echo "=== Creating Application Directory ==="
+mkdir -p /opt/stiftung
+chown stiftung:stiftung /opt/stiftung
+
+echo "=== Setup Complete! ==="
+echo "Next steps:"
+echo "1. Switch to stiftung user: su - stiftung"
+echo "2. Clone your repository to /opt/stiftung"
+echo "3. Configure environment variables"
+echo "4. Start the application"