fix potential docker issue

Dockerfile

@@ -1,8 +1,8 @@
-FROM node:20-alpine AS base
+FROM node:20-slim AS base
 
 # Install dependencies only when needed
 FROM base AS deps
-RUN apk add --no-cache libc6-compat
+RUN apt-get update && apt-get install -y libc6-compat
 WORKDIR /app
 
 # Install dependencies based on the preferred package manager
@@ -34,8 +34,8 @@ WORKDIR /app
 ENV NODE_ENV=production
 ENV NEXT_TELEMETRY_DISABLED=1
 
-RUN addgroup --system --gid 1001 nodejs
-RUN adduser --system --uid 1001 nextjs
+RUN groupadd --system --gid 1001 nodejs
+RUN useradd --system --uid 1001 nextjs
 
 # Create directories for mounted volumes with proper permissions
 RUN mkdir -p /app/scripts /app/data /app/snippets && \
@@ -58,6 +58,9 @@ COPY --from=builder /app/yarn.lock ./yarn.lock
 # Copy node_modules for production dependencies
 COPY --from=deps --chown=nextjs:nodejs /app/node_modules ./node_modules
 
+# Don't set default user - let docker-compose decide
+# USER nextjs
+
 EXPOSE 3000
 
 ENV PORT=3000

app/_utils/system.ts

@@ -33,50 +33,15 @@ async function readCronFiles(): Promise<string> {
     }
   }
 
+  // In Docker, use the host's crontab binary
   try {
-    const crontabPath = "/host/crontab";
-    const crontabsDir = "/host/cron/crontabs";
-
-    let cronContent = "";
-
-    try {
-      const systemCrontab = await fs.readFile(crontabPath, "utf-8");
-      cronContent += systemCrontab + "\n";
-    } catch (error) {
-      console.log("System crontab not found or not readable");
-    }
-
-    try {
-      const files = await fs.readdir(crontabsDir);
-      for (const file of files) {
-        if (file !== "root") {
-          try {
-            const userCrontab = await fs.readFile(
-              path.join(crontabsDir, file),
-              "utf-8"
-            );
-            if (userCrontab.trim()) {
-              cronContent += `# User: ${file}\n${userCrontab}\n`;
-            }
-          } catch (error) {
-            console.log(`Could not read crontab for user ${file}`);
-          }
-        }
-      }
-    } catch (error) {
-      console.log("User crontabs directory not found or not readable");
-    }
-
-    return cronContent || "";
+    const { stdout } = await execAsync(
+      '/host/usr/bin/crontab -l 2>/dev/null || echo ""'
+    );
+    return stdout;
   } catch (error) {
-    console.error("Error reading cron files:", error);
-    try {
-      const { stdout } = await execAsync('crontab -l 2>/dev/null || echo ""');
-      return stdout;
-    } catch (fallbackError) {
-      console.error("Fallback crontab command also failed:", fallbackError);
-      return "";
-    }
+    console.error("Error reading crontab:", error);
+    return "";
   }
 }
 

docker-compose.yml

@@ -3,13 +3,13 @@ services:
     image: ghcr.io/fccview/cronmaster:main
     container_name: cronmaster
     user: "root"
-    ports:
-      # Mapping custom port 40123 due to 3000 being very common
-      - "40123:3000"
+    network_mode: host
     environment:
       - NODE_ENV=production
       - DOCKER=true
       - NEXT_PUBLIC_CLOCK_UPDATE_INTERVAL=30000
+      # Feel free to change port, as we're running this as host you won't be able to externally map it
+      - PORT=40123
       # Enter the FULL relative path to the project directory where this docker-compose.yml file is located (use `pwd` to find it)
       - NEXT_PUBLIC_HOST_PROJECT_DIR=/absolute/path/to/project/directory
     volumes:
@@ -20,6 +20,7 @@ services:
       - /proc:/host/proc:ro
       - /sys:/host/sys:ro
       - /etc:/host/etc:ro
+      - /usr:/host/usr:ro
       # Mount scripts directory for script execution
       - ./scripts:/app/scripts
       # Mount data directory for persistence