Add Docker support for FoodsharingSiegen project

Introduced Docker setup, including `docker-compose.yml`, `dockerfile.server`, and related Python helper scripts (`image-create.py`, `image-push.py`, `publish-project.py`, `publish-aio.py`) for building, managing, and deploying Docker images. Updated `.gitignore` to exclude published files, and renamed a field label in the Blazor component for better clarity.

Docker/image-create.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+import subprocess
+from datetime import datetime
+
+def image_exists_on_server(full_image_tag):
+    """
+    Check if a Docker image exists on the remote server.
+    Uses 'docker manifest inspect' which returns 0 if the image is found.
+    Debug output is printed for inspection.
+    """
+    try:
+        subprocess.run(
+            ["docker", "manifest", "inspect", full_image_tag],
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            text=True,
+            check=True
+        )
+        print(f"[DEBUG] Found image on server: {full_image_tag}")
+        return True
+    except subprocess.CalledProcessError as e:
+        print(f"[DEBUG] Image not found on server: {full_image_tag}. Error: {e.stderr.strip()}")
+        return False
+
+def get_date_tag(base_tag, today):
+    """
+    Given the base image tag (e.g. 'ghcr.io/troogs/fs-onboarding/server')
+    and today's date, find the first available tag in the format YYYYMMDD-i
+    that is not already present on the remote server.
+    """
+    i = 1
+    while True:
+        date_tag = f"{today}-{i}"
+        full_tag = f"{base_tag}:{date_tag}"
+        print(f"[DEBUG] Checking tag {date_tag}: {full_tag}")
+        
+        if not image_exists_on_server(full_tag):
+            print(f"[DEBUG] Tag {date_tag} is available for use.")
+            return date_tag
+        else:
+            print(f"[DEBUG] Tag {date_tag} is already in use. Incrementing index.")
+        i += 1
+
+def main():
+    # Get today's date in YYYYMMDD format.
+    today = datetime.now().strftime("%Y%m%d")
+    print(f"Using date tag base: {today}")
+    
+    base_image_tag = "ghcr.io/troogs/fs-onboarding/server"
+    date_tag = get_date_tag(base_image_tag, today)
+    print(f"Common date tag determined: {date_tag}")
+
+    # Build command using the common date tag for the server image.
+    command = (
+        f"docker build -f dockerfile.server "
+        f"-t {base_image_tag}:latest "
+        f"-t {base_image_tag}:{date_tag} ..\\"
+    )
+    print(f"Executing: {command}")
+    subprocess.run(command, shell=True, check=True)
+
+if __name__ == "__main__":
+    main()