Lint and update docker-compose.yml

- Fixed port variable interpolation to use ${PORT:-8000} for a default value.
- Updated volume configuration to use a named volume (guestbook_data) mounted at /data.
- Improved YAML formatting for clarity.

.env

@@ -0,0 +1,11 @@
+# Port to expose (default 8000)
+PORT=5000
+# Flask environment setting (production)
+FLASK_ENV=production
+# Path to the SQLite database (this file will be stored in the mounted /data volume)
+DATABASE_PATH=/data/scripts/guestbook.db
+# Number of Gunicorn workers (adjust as needed)
+GUNICORN_WORKERS=3
+PID=1000
+GID=1000
+

Dockerfile

@@ -1,14 +1,21 @@
-FROM python:3.9-slim
-
-WORKDIR /app
-
-# Copy and install Python dependencies.
-COPY requirements.txt requirements.txt
-RUN pip install --no-cache-dir -r requirements.txt
-
-# Copy the rest of the app code.
-COPY . .
-
-EXPOSE 5000
-
-CMD ["python", "app.py"]
+# Use a lightweight Python image
+FROM python:3.9-slim
+
+# Set the working directory
+WORKDIR /app
+
+# Install dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy the application code
+COPY . .
+
+# Set environment variables (can be overridden by .env)
+ENV FLASK_ENV=production
+
+# Expose the port (Gunicorn will run on 8000)
+EXPOSE 8000
+
+# Run the app with Gunicorn; use 3 workers (can be tuned via .env)
+CMD ["gunicorn", "--bind", "0.0.0.0:8000", "app:app", "--workers", "3"]

app.py

@@ -9,7 +9,9 @@ logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger(__name__)
 
 app = Flask(__name__)
-DATABASE = 'guestbook.db'
+
+# Use an environment variable for the database path (defaulting to 'guestbook.db')
+DATABASE = os.environ.get('DATABASE_PATH', 'guestbook.db')
 
 def load_banned_words():
     """Load a set of banned words from a local file.
@@ -48,6 +50,7 @@ def contains_banned_words(text):
     return False
 
 def init_db():
+    """Initialize the SQLite database and create the guests table if it doesn't exist."""
     conn = sqlite3.connect(DATABASE)
     c = conn.cursor()
     c.execute('''
@@ -66,9 +69,15 @@ def init_db():
     logger.info("Database initialized.")
 
 def is_valid_email(email):
+    """Simple regex-based email validation."""
     pattern = r'^[\w\.-]+@[\w\.-]+\.\w+$'
     return re.match(pattern, email)
 
+@app.before_first_request
+def initialize_database():
+    """Ensure the database is initialized before handling the first request."""
+    init_db()
+
 @app.route('/', methods=['GET', 'POST'])
 def index():
     error = None
@@ -109,6 +118,7 @@ def index():
         logger.info("New guest entry added: %s from %s.", first_name, location)
         return redirect(url_for('index'))
 
+    # For GET requests, retrieve guest entries to display.
     conn = sqlite3.connect(DATABASE)
     c = conn.cursor()
     c.execute('SELECT first_name, location FROM guests ORDER BY id DESC')
@@ -118,6 +128,7 @@ def index():
     return render_template('index.html', error=error, guests=guests)
 
 if __name__ == '__main__':
+    # For development use; production (gunicorn) will not execute this block.
     init_db()
-    logger.info("Starting Flask app on host 0.0.0.0, port 5000.")
-    app.run(host='0.0.0.0', port=5000)
+    logger.info("Starting Flask app on host 0.0.0.0, port 8000.")
+    app.run(host='0.0.0.0', port=8000)

docker-compose.yml

@@ -0,0 +1,15 @@
+version: "3.8"
+services:
+  guestbook:
+    build: .
+    container_name: guestbook
+    ports:
+      - "${PORT:-8000}:8000"
+    env_file:
+      - .env
+    volumes:
+      # Mount a named volume at /data so that the database file (configured in .env) persists
+      - /home/steve/kiosk-guestbook:/data
+
+volumes:
+  guestbook_data:

production.Dockerfile

@@ -0,0 +1,14 @@
+FROM python:3.9-slim
+
+WORKDIR /app
+
+# Copy and install Python dependencies.
+COPY requirements.txt requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy the rest of the app code.
+COPY . .
+
+EXPOSE 5000
+
+CMD ["python", "app.py"]

requirements.txt

@@ -1,3 +1,3 @@
 Flask==2.2.5
 Werkzeug>=3.0.6
-
+gunicorn

templates/index.html

@@ -4,7 +4,7 @@
 <head>
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
-    <title>The Montana Dinosaur Center Visitor Guestbook</title>
+    <title>The Montana Dinosaur Center Visitor Log</title>
     <!-- Bootstrap CSS -->
     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet">
     <style>
@@ -41,7 +41,7 @@
     <div class="container mt-5 mb-5">
         <header class="d-flex align-items-center mb-4">
             <img src="static/images/logo.png" alt="Museum Logo" class="me-3" style="height: 50px;">
-            <h1 class="h3 mb-0">Museum Visitor Guestbook</h1>
+            <h1 class="h3 mb-0">The Montana Dinosaur Center Visitor Log</h1>
         </header>
 
         <!-- Brief instructions for the form -->