add database stack

databases/docker-compose.yml

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+version: '3.8'
+
+services:
+  postgres:
+    image: postgres:17
+    container_name: mystic-postgres
+    restart: unless-stopped
+    environment:
+      POSTGRES_PASSWORD: Nyhjew-didvot-zypsa7
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    ports:
+      - "5432:5432"
+
+  mongodb:
+    image: mongo:latest
+    container_name: mystic-mongo
+    restart: unless-stopped
+    volumes:
+      - mongo_data:/data/db
+    ports:
+      - "27017:27017"
+
+volumes:
+  postgres_data:
+  mongo_data:

setup-commands.md

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+# 🛠️ Mystic Stack: Node Onboarding Guide
+
+Remove any standalone `node_exporter` installations to avoid port conflicts on `9100`.
+
+```bash
+sudo systemctl stop node_exporter
+sudo systemctl disable node_exporter
+sudo rm /etc/systemd/system/node_exporter.service
+sudo systemctl daemon-reload
+
+# Install dependencies
+sudo apt-get update
+sudo apt-get install ca-certificates curl gnupg git -y
+
+# Add Docker’s official GPG key
+sudo install -m 0755 -d /etc/apt/keyrings
+curl -fsSL [https://download.docker.com/linux/ubuntu/gpg](https://download.docker.com/linux/ubuntu/gpg) | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+sudo chmod a+r /etc/apt/keyrings/docker.gpg
+
+# Add the repository to Apt sources
+echo \
+  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] [https://download.docker.com/linux/ubuntu](https://download.docker.com/linux/ubuntu) \
+  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
+  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+
+# Install Docker Stack
+sudo apt-get update
+sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin -y
+
+# Install dependencies
+sudo apt-get update
+sudo apt-get install ca-certificates curl gnupg git -y
+
+# Add Docker’s official GPG key
+sudo install -m 0755 -d /etc/apt/keyrings
+curl -fsSL [https://download.docker.com/linux/ubuntu/gpg](https://download.docker.com/linux/ubuntu/gpg) | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+sudo chmod a+r /etc/apt/keyrings/docker.gpg
+
+# Add the repository to Apt sources
+echo \
+  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] [https://download.docker.com/linux/ubuntu](https://download.docker.com/linux/ubuntu) \
+  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
+  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+
+# Install Docker Stack
+sudo apt-get update
+sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin -y
+
+sudo usermod -aG docker $USER
+newgrp docker
+
+# Generate key (Press Enter for all prompts)
+ssh-keygen -t ed25519 -C "$(hostname)"
+
+# Output public key for Forgejo Web UI
+cat ~/.ssh/id_ed25519.pub
+
+# Setup Directory
+mkdir -p ~/mystic-stack && cd ~/mystic-stack
+
+# Clone Repository (Using Tailscale IP of Git VM)
+git clone git@100.98.158.31:bray/infra.git .
+
+# Launch Node Exporter
+docker compose -f nodes/docker-compose.node.yml up -d