feat: add Docker image with cron-based scheduled monitoring (Fixes #28)

Dockerfile

@@ -0,0 +1,31 @@
+FROM python:3.12-slim
+
+LABEL org.opencontainers.image.source="https://github.com/rugpullnet/solana-rug"
+LABEL org.opencontainers.image.description="Solana Rug Guard — background monitoring container"
+
+WORKDIR /app
+
+# Install solana-rug from source
+COPY scripts/ scripts/
+COPY solana_rug/ solana_rug/
+COPY pyproject.toml setup.py README.md ./
+RUN pip install --no-cache-dir .
+
+# Copy entrypoint
+COPY docker-entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+# Persistent data volume
+VOLUME /data
+
+# Default config via env
+ENV WATCH_TOKENS=""
+ENV WATCH_INTERVAL=300
+ENV WEBHOOK_URL=""
+ENV SQLITE_HISTORY=/data/history.sqlite3
+ENV SOLANA_RPC_URL=""
+
+HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
+    CMD python3 -c "import os; exit(0 if os.path.isfile(os.environ.get('SQLITE_HISTORY','/data/history.sqlite3')) else 1)"
+
+ENTRYPOINT ["/entrypoint.sh"]

docker-compose.yml

@@ -0,0 +1,18 @@
+version: "3.9"
+
+services:
+  solana-rug:
+    build: .
+    container_name: solana-rug-monitor
+    restart: unless-stopped
+    volumes:
+      - solana-rug-data:/data
+    environment:
+      - WATCH_TOKENS=DezXAZ8z7PnrnRJjz3wXBoRgixCa6xjnB7YaB1pPB263,EPjFWdd5AufQSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v
+      - WATCH_INTERVAL=300
+      - WEBHOOK_URL=
+      - THRESHOLD=40
+      - SOLANA_RPC_URL=
+
+volumes:
+  solana-rug-data:

docker-entrypoint.sh

@@ -0,0 +1,57 @@
+#!/bin/sh
+# docker-entrypoint.sh — cron-like monitoring loop for solana-rug Docker image.
+#
+# Reads WATCH_TOKENS (comma-separated mint addresses) and checks each
+# on the configured interval, storing results in SQLite and optionally
+# posting webhook alerts.
+
+set -e
+
+if [ "$WATCH_TOKENS" = "***" ] || [ -z "$WATCH_TOKENS" ]; then
+    echo "ERROR: WATCH_TOKENS env var is required (comma-separated mint addresses)"
+    exit 1
+fi
+
+echo "=== Solana Rug Guard Docker Monitor ==="
+echo "Watch list: $WATCH_TOKENS"
+echo "Interval: ${WATCH_INTERVAL}s"
+echo "History: $SQLITE_HISTORY"
+echo "Webhook: ${WEBHOOK_URL:-disabled}"
+echo ""
+
+# Trap SIGTERM for graceful shutdown
+trap 'echo "Shutting down..."; exit 0' SIGTERM SIGINT
+
+while true; do
+    echo "[$(date -u +'%Y-%m-%dT%H:%M:%SZ')] Checking tokens..."
+
+    OLD_IFS="$IFS"
+    IFS=','
+    for mint in $WATCH_TOKENS; do
+        mint=$(echo "$mint" | tr -d ' ')
+        echo "  Checking $mint..."
+
+        if [ -n "$WEBHOOK_URL" ]; then
+            python3 -m scripts.rugguard token "$mint" --json 2>/dev/null | \
+                curl -s -X POST "$WEBHOOK_URL" \
+                    -H "Content-Type: application/json" \
+                    -d @- >/dev/null 2>&1 && \
+                echo "    Webhook sent" || \
+                echo "    Webhook failed"
+        fi
+
+        # Also store in history via watch command (if history is persisted)
+        env SQLITE_HISTORY="$SQLITE_HISTORY" \
+            python3 -m scripts.rugguard watch "$mint" \
+                --iterations 1 --interval 1 \
+                --history "$SQLITE_HISTORY" \
+                ${WEBHOOK_URL:+--webhook "$WEBHOOK_URL"} \
+                ${THRESHOLD:+--threshold "$THRESHOLD"} \
+                2>&1 | sed 's/^/    /'
+    done
+    IFS="$OLD_IFS"
+
+    echo "  Sleeping for ${WATCH_INTERVAL}s..."
+    sleep "$WATCH_INTERVAL" &
+    wait $!
+done